dumb question, why not build a bbm if you are looking for 650 hp or more? yeah it will cost more if you don't have a good bbm block, heads, intake, headers but it won't break as easy and you won't have to squeeze the last bit of hp out of it
True enough.If your looking for a budget motor that will last at the 650 h.p level ,I'd suggest building a 400 based 451. Heck an iron headed one with manifolds will make 550 h.p. It's childsplay to build a 650 h.p 451 using alum heads an headers.
I am really not sure how long the small block will survive at 650. Of course you could always turbo charge it....that will get you MORE h.p than you want..
