Year to year /6 compatibility

valiantwagonguy said

Been driving Valiants and other Mopars with slants in them since the 60's.I like the pre 1967 motors but that's just me.The 70's motors are good as long as you lose all the pollution control stuff and put on an early carb. That wakes them right up.Any year will fit in your truck especially seeing that it's a standard shift vehicle.I wouldn't use anything later than a 78

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Do not use a pre 67 motor. The crank flange and flywheel mounting are different. Also whatever engine you use make sure the pilot bearing hole is finished. Some cranks for automatics are just drilled, and not reamed to size. Also a pre 81 engine will have a solid lifter adjustable valve train, not hydraulics like your engine. Nothing wrong with that, and can be converted if you wish. Just be aware of the difference.