[JustACelt]

I like the idea of sticking the modern powerplant in the older cars, you can always tweak it back if need be. Altering suspension and breaking depends how much ya want to spend and what ya wanna do with it. Most of those cars could make it down the 1/4 mile or do some light to light highjinks with there original stuff, maybe stuff an extra leaf in the springs if you want harder launches and lower the wheel hop. I think that anything under 13 in the quarter requires a cage for the 1/4 mile nowadays. I personally would not modify any originally equipped hemi cars nor 440 6pack or 340 6packs. I would probably limit the mods to 6 bangers , 273,318, 360, 383, and 400 ci car models , you would turn that vehicle into a nasty "sleeper car" that would be loads of fun that will prolly still be more fuel efficient than the original engines. Its a matter of the fun factor and your own personal tastes , plus how much play money you have.