Swapping a small block to big block...who's done it?

In terms of building the engine, the money is very similar, say, within $500-1000. In terms of support items, the small block stroker wins hands down. You can use all existing stuff..headers, transmission, torsion bars, radiator, etc. Even if it isnt "the best" for the stroker, the fact remains that it will bolt up, and can be run. The secret to any small block stroker is the crank..the bore size is very little bonus, until you begin to approach power levels where things like valve shrouding really come into play. I'm plannig a 318 based 4" crank eninge for my plow/tow truck. It's not any more $$ than others, and I have one nobody else wants. The Speedomotive 400 to 450 kit is for a big block B engine, using a 440 crank core. The B enignes are an easier fit in terms of exhaust and steering clearance, and weight if it's all iron.