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

moper said
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..

I agree 100% in fact I may be building selling them for sell in the near future...

moper said
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.

One point here fastback68cuda you should remember a B ( 361 383 400 ) is lighter than a 440 I think ~50 Lbs they are heaver than a LA motor. If you are still concidering a B I would sugest a 400 stroked to 451 ( 450 ) I have built them and they have a lot less rotating mass than a 440, A 440 in a a body is tight it can be done but the RB is wider and taller it is harder to work with..

If you really want a 440 them use al heads ( do not use any with raised exaust ports ) and a stroker kit.

With any b or RB in a b I would recomend headers as the manafolds used by the factory in 383 GTS fit but cost HP. Stoker B or RB really need headers I tried to use 440 mag manafolds on the last 451 I built, after a few years I instaled small tube full lengh headers and it made a world of difference.

This is my 2c