We’ll start with the engine, and assume you are referring to the 440 Super Commando (not Hemi) The ’67 engine was one-year-only, having unique pistons, heads (915), carb (AFB), and manifolds. Later 440s were similar, but not the same. It was internally balanced, con rods and crankshaft were drop-forgings. Oil pan was 4-quart, unbaffled, and a “sandwich” type windage tray was fitted. A one-year-only dual-snorkel air cleaner was used, with a silkscreened-aluminum “440 Super Commando” nameplate (“pie tin”). The engine was painted turquoise, valve covers were chromium-plated.
Automatics used a Chrysler-Indy built aluminum single-point distributor, 4-speeds had the Prestolite ball-bearing-braker, iron-case dual point sparker. Ignition wires were hypalon insulated.
A standard fuel pump and pushrod (same as 383) and 5/16" fuel line was used, there was no vapor return line.
Automatics used a beefed (4-pinion planetaries, etc.) A727, 4-speeds used the “Hemi” (18-spline) A833. Automatics use an 8-3/4" rear axle (3.23:1) while 4-speeds were 3.54-cogged Dana 60s (9-3/4" ring gear)
Exhaust was 2-1/2" headpipes with “H” crossover, dual reverse-flow mufflers, bright angled exhaust tips which doubled as the tail pipe hangers.
Brakes were 11" HD drums, front discs (Bendix, 4-piston) were optional.
Suspension (and shocks) were HD, with special biased rear leafs designed for windup torque control. A front sway bar was standard.