400 stroker

How big is the budget? What do you want to do? Personally I'd build a 451 or a 470 with Trick Flow heads and a street roller type cam but that type of build will usually add up to $10K or so if you have to buy all the parts new. If the budget isn't that big then maybe some Edelbrock heads and a flat tappet cam with an Edelbrock carb. You can do a build like that for maybe $7K depending on the quality of the rotating assembly and how much stuff you have to buy new.