depends on which V8, several to choose from. Classic Chevy 350 is pretty common, and super cheap, LT1's, LS1's. Ford has quite a few to choose from. The condition and where you get them from is going to be where youll find a price. If they come with the accessorries, harnesses, PCM/ECU, its quite a large playing field.
Either way advance adaptors and novak have a pretty good info site on what you'll need for such a project. or you can fab everything yourself and save some cash. or a mixture of the both. also consider if your gonna change the tranny and axles and such.
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