Do you just want a parts list? Or are you trying to figure this out on your own? I can help you if your more direct, but I really dont have time to guess what it is your after. The 400 is a solid platform though, so you have a good starting point.
yes i just realized that my engine is perfectly fine by its standards it preforms as if the engine has been rebuilt before but the guage just indicates high mileage
if anything i would need to swap the cylinder heads, push rods, tappets and intake manifold. those are my key factors
as far as the small stuff i just ordered the OEM carpet today and i plan to rebuild the carburetor( 4bbl) btw
I also am going to swap my stock mufflers which sound like there pretty much brand new and look new from the outside to Flow masters 40 series mufflers. As for the exhaust manifolds (they are basically in swappable) there the cast iron heads. no point in swapping them if i cannot find a OEM fit in my state that will juice up my exhaust system to much. In my state is states specifically i am not allowed to "modify exhaust system to sound louder then stock exhaust" meaning i cannot have a super loud roaring engine to the point that it effects others. but what it does not state anything about having preformance. all flowmasters are legal in all 50 states.