MCG Expert Panel | Chrysler, Dodge, Plymouth Expert Richard Ehrenberg

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Engineering Editor for Mopar Action for the past 25 years, and was the Technical Editor of High Performance Mopar and Musclecars Magazine. Completed the One Lap America about ten times usually winning his class.

Areas of Expertise:



Rick Ehrenberg has been building, tuning, and racing Mopars since 1957, with a concentrated field of expertise in Mopars built from 1962 through 1980.

With a technical education background (electronics, mechanics, and physics), Ehrenberg was, for many years, the Technical Editor of High Performance Mopar and Musclecars magazine, and has been Engineering Editor for Mopar Action for 25 years.

Rick’s mantra is simple: Well-rounded performance.If he builds a Mopar that runs 11s, that’s great, but it should also stop on a dime and give a nickel’s change, corner on rails, get decent fuel economy, be reasonably comfortable and quiet, and run on pump fuel only.Ehrenberg is well known for not changing things just for the sake of change

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gary's hobbie Historical 1969-1969 Plymouth - Road Runner

Roadrunner 1969 convertible triple black

Hi Richard, my name is Kathy and I have a 1969 convertible triple black all numbers matching car. Just wondering, It is a 383 car, automatic, how many were triple black? is it a fairly rare car? Thank you!


I thought everybody knew by now this was one of my hot-button issues. The answer: ZERO. Even if, perchance, you are referring to Plymouth Road Runners, nobody knows, because said data was simply not compiled, but if I were a betting man, I’d say around 2% of production ragtops were 3X black. Rare!


about 1 year ago
Seans Restorations My Car 1968-1968 Dodge - Coronet

68 Coronet R/T Convertible

I have a numbers matching barn find. 68 Coronet R/T Convertible and yes it’s yellow. SS1. How many yellow ones were made and how many to Canada. 440 automatic with centre console and bulk interior. And yes all numbers match. Just wondering how many and whats it worth in the US when i’m done doing resto


No data re: Options, colors was compiled, so I can’t help on that, sorry.

The value depends on so many factors, #1 being what the buyer is willing to pay (duh). If the car is restored to OEM / concours / platinum levels, i.e., zero bondo, no clearcoat, date coded components, no serious blunders (e.g.: blackout missing, unpainted exhaust manifolds, etc.), and has at least some of the desirable options (TicTocTach, wood-grain steering wheel, disc brakes, power windows, etc.), and they are original, and you have a data plate and broadcast sheet to prove it, and all numbers match, you might, if the planets align, fetch upwards of US$100K.

If none of these conditions apply,even if very presentable, maybe half of that.

The bulk interior worries me. Oats, hay, etc. would not be a huge problem, but sand, gravel, or or other aggregates would. ;→


about 1 year ago
aviador garaje My Car 1977-1977 Dodge - Monaco

Help Diagram electric dodge monaco 1977

Hello friend Richard Ehrenberg. What is the dodge monaco 1977 electric diagram, can you help me ??


The diagrams alone are probably 50-75 pages in the service manual. I don’t see any way of obtaining this other than purchasing the manual (which can be had right now cheaply on ebay: )

There are also CD-ROM copies of all 3 volumes of the service manual (chassis, body, and electrical).


about 1 year ago
Chopper General 1970-1970 Plymouth - Barracuda

70 baracuda wheel track

Hi Richard, my name us George from Australia,
I’ve trying to get exact information of the wheel track of a 70 hemi cuda .
I need the Front wheel Track (centre -centre)?
Rear wheel Track ? (centre-centre)
Wheelbase ?
Curb Weight of car?
Overal Diameter of a F60 tyre on a 15" wheel ?
I need to supply copies or photographic evidence from a service manual of all above information to an engineer who is going to certify my 70 modified Cuda to be registered on road this week, since my car has 20" wheels fitted with a shortened Dana 60 differential ,
I would appreciate all your help, because I’m getting different measurements every time I do an Internet search,
many thanks George!


The official AMA specs are posted here:;view=1up;seq=1

There were also some specs and dimensioned drawings in the FSM.



Lots of Mopar goodies here:

about 1 year ago
A12 Obsessed General 1969-1970 Plymouth

69 RR Fiberglass Lift Off Hood

How can I fix a small scratch on the top of my fiberglass lift off hood? Its a repro and its black. Thanks


Because the paint is Organisol, there’s no simple touch-up procedure, other than an artist’s brush attempt with a steady hand, blending is not possible. Failing that, it must be completely refinished.


about 1 year ago

Most popular floor mats in 1970 th for B bodies ?

What were the most common material for OEM car floor mats for e.g. a 1973 Dodge Charger after the moment the car was delivered brand new from the dealer to the US customer? carpet or rubber in America ?
In germany I have the Impression it was rubber, so I assume it was the same in US, right?


They were, indeed, rubber, fairly simple and not especially well-fitting. They were not molded or contoured like today’s better mats.


about 1 year ago
A12 Obsessed General 1966-1972 Plymouth

69’ RR A12 tribute – motor mounts

The 440 Six pack motor in my car jumps to the passenger side about 1 1/2" when i punch it. Is this normal? I have gotten so many opinions. Right now it looks like its metal to metal where the motor mounts go. Does it need motor mounts, if yes, what? Hard to believe that the previous owner who built the car would just overlook that? Might be hard to answer without seeing the car, but any insight would be greatly appreciated.


Sure sounds like a shot mount! Stock, there was a “roll restraint cable” that prevented the engine from torquing that high if the mount failed.

The made in India part-store mounts fail almost instantly. I have sourced some decent ones:


about 1 year ago

Mystery Plymouth

BCHS is primarily a GM engine speed shop. A customer has blessed us with work on a 1974 Plymouth which appears to be a Duster but has no conclusive model identification. The nameplate on the front fenders contains the words “Commando -V8” but online research suggests Commando was never a Plymouth model name, but an engine type used in Barracudas, which this car is almost certainly not. As the car was purchased as a used dragster and is titled in VA which does not include model names on title/registration paperwork, the customer has not been able to identify the model, and we having some difficulty sourcing some parts we need without conclusively identifying the model. We are hoping you can pin this down for us as the customer has other performance cars which are more in our bailywick and we would like to retain his business. I do have a pic but the Attach Photo function on your website seems not to want to upload it – if you have a direct email, I will send it Thanks! Ed Nace.


It is a Plymouth Scamp, which was a mundane grocery getter. 111” WB, basically Plymouth-badged Dart Swinger, which is in the Chrysler A-body category. Largest engine was 318 2-Bbl.

“Commando” was the name attached to any Plymouth performance engine from approx. 1965 thru 1971.


about 1 year ago
Needabiggergarage. General 1966-1978 Chrysler

Placement of O2 sensor bung in stock 440 Manifold

I want to keep my stock Chrysler 440 exhaust manifolds, and I want to utilize an AFR gauge (obviously with an O2 sensor). Where would be the best location for the O2 bung? Before, or after, the exhaust manifold/exhaust pipe connection? Distance (inches) from the connection?

Rick D.


Unless you want to attempt drilling and tapping an 18mm hole in the manifold, it definitely has to be in the pipe. The closer to the manifold you get it, the better it will work on cold starts, but some guys forego that and put it in the “Y” or “X” (crossover) to get a more accurate average of both banks. Personally, I haven’t found that it makes a whole lot of difference.


about 1 year ago
Howlin My Car 1966-1966 Dodge - Coronet

66 Coronet Convertible

Hi, I have a original 63,000 mile 66 Coronet 500 Convertible and I would like to purchase wider steel wheels that will take my factory hubcaps to maintain the stock look. What size/offset can I fit front and back? and where can I get them from?
Also – under the paint code on my tag is 999, what does this mean?



If it is original, it could NOT have hubcaps! See pix…all ’66 Coronet 500s had full wheel covers on 14" steel wheels.

While 8" wide wheels would clear easily in the front, out back, anything over 7" gets very tight. No matter which width you wind up with, the offset should be near zero.

Most guys throw in the towel and opt for larger diameter wheels due to the poor selection of 14" tires. If you want to keep it a pure resto, with repro tires, though, that’s cool. You might also find some 15" Dodge C-body wheel covers that at least look “period correct”.

Remember, too, that spirited driving and wheel covers don’t mix. Zero brake cooling, and loss of covers due to wheel flex. Just sayin’….

Paint code 999 = special order. Basically, anything the buyer wanted!


about 1 year ago
Dodge Boyz General 1968-1968

Real Coronet RT or fake?

I’m looking at buying a 68 Dodge Coronet RT that I found online. Before I visit the seller I’d like to know if there are any other stamped numbers on the car somewhere that would ID it as a real RT besides the dash VIN code. Or should I trust that the dash with VIN is the original dash for that car? Another question would be the front bench seat: I read that all RTs came with bucket seats? Thanks!


1968 Was a transition year for VIN stampings. This was the first year that the VIN was required to be stamped on the engine block, transmission, and rear axle. The data plate (“fender tag” would show the full VIN and the Sales Order number, the second number, would be stamped in at least 2 places, the most visible would be the driver’s side of the radiator yoke.

The R/T VIN must start with “WS23” for a hardtop or WS27 for a rag.

The engine, besides showing the VIN, must be a correctly dated and trimmed 426 Hemi or 440 (depending on VIN)

All had buckets with welded reinforcements for the 4 inner holes (under the carpet. Console or center seat was optional.



Check my eBay deals at

about 1 year ago
Sixpak Garage General 1964-1980 Dodge

833 4-speed backup light doesn’t work

I Have a 1970 Dodge Challenger TA that has a backup light that won’t come on unless I hold the shift handle forward with a little pressure on it. If I disconnect the reverse linkage rod when it is in reverse, it works only if I pull back on the linkage lever about an 1/8 of an inch or so. I I have tried the o-ring style switch and the original style gasket switch. Just seems like the switch does not go into transmission far enough for the lever to activate the switch. What do you recommend. Thanks, Glenn kempf Ferdinand, IN


Remove the side cover and have a peek, it should be obvious. I suspect a broken or loose weld holding the inner lever the the lever shaft.


about 1 year ago
A12 Obsessed General 1968-1970 Plymouth - Road Runner

Vinyl Top

Im looking at a 69.5’ RR A12 and it has a vinyl top that was ADDED. Can the vinyl top be removed fairly easily? What will the paint look like underneath? Is it going to be a total repaint required?


The cover will peel off fairly easily and probably in one piece. Then the fun starts, especially as we have no idea what type of paint is beneath it (original?) and what type of adhesive was used. You may be able to find a solvent that will remove the glue residue without affecting the paint, but, overall, I’d be planning on a repaint (of the roof) and blending into the quarters (at a minimum).

If it was a duplicate of the factory installation, you’ll also be looking at molding-clip-hole patching (unless you go for a 2-tone paint job), and obtaining a set of non-vinyl drip rail moldings.

The vinyl roof covers trapped moisture, finding some rust underneath it is also quite possible.


about 1 year ago
zona toys General 1969-1969 Plymouth - Road Runner

Rare Color Scheme ???
69 Roadrunner

how rare is this colour scheme?
and how much could this car 2.5/5 be worth?
it hasn’t run for 15 years but just needs some body work and has the original 383 done up .40 over about 50k miles ago.

red hood stripes
blue interior

please and thank you.


No question: It is very unusual. Unfortunately, there is no way to quantify that statement — no numbers, no records.



Road Runner, NEVER Roadrunner!

about 1 year ago
Woody's 75 Shop Historical 1975-1975 Plymouth - Valiant

1975 Production Numbers

I love your column and answers! My father owned a small Chrysler/Plymouth dealership when I was young so I have always loved Mopars, although I’ve never tried to restore any of them. I recently purchased a 1975 Valiant Brougham 2-door with a 318 engine, auto trans. and very few other options. I’ve decoded the fender tag and broadcast sheet and everything seem to be original except the tires and rims (15 inch). I do have the original wire rim wheel covers. My 2 questions: Can you tell me how many 2-door Valiant Broughams were produced in ‘75 and how many came with 318 engines? Also, I can’t find broadcast sheet codes S12, V61, and W86?




Unfortunately, I don’t have production numbers for your car, if I had to guess, I’d say a few thousand, probably half with the 318. Just a guess!

S12 indicates “standard” suspension
V6"X" is a vinyl roof, but the third character should be a letter for a color. Might be a typo.
W86 is 14 X 5.5" wheels


about 1 year ago
Jim Wood Mopar Historical 1962-1979 Plymouth

69 RR owner search

Richard, is it possible in North Carolina with a vin number to know who was the first owner? I purchased a RR in 69 new and I might be able to get it back. A friend is trying to help with getting the now owners information. I now live in Alabama. Doe’s Chrysler keep that kind of records? I will have the vin soon I hope.


No records of “current owner” were kept back then (by the factory); there was no law requiring them to even TRY to maintain such records.

Current DMV privacy laws in most states are working against you, too, plus many DMVs purge records after “X” years (in NY is is five).

The only hope is real gumshoe work: First, obviously, see if the glove box has any papers (bill of sale, Monroney label, etc.) Failing that, ask the seller whom he bought it from and work backwards. There are online services that, for a few bucks, will track individuals (not cars) and provide contact info, criminal histories, relatives, etc. This is actually scary…


about 1 year ago
MCG Garage d4cdd5 My Car 1969-1969 Dodge - Dart

1969 dodge dart gts

Hi I am in the process of buying a 1969 dodge dart gts , how can i tell if its the real deal ? the vin is LS23 which tells its a gts is there any other things i shouls look for ? thank you Frank Nizza


If it is being sold as a “matching numbers”, check the VIN on the engine and trans, also on the radiator yoke. Check the data plate carefully to see if all options are present and accounted for, and hope there’s a broadcast sheet available.

Without knowing which engine and powertrain this has, and whether this is a project car, survivor, resto, or resto-mod, there’s not much else I can advise.


about 1 year ago
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