Originally Posted by gearheadslife
I think you'll be lucky to have an honest 270-280hp..
g.m.'s base crate is a 8.50 to one engine and is 260
how big a dish is those pistons to get 8.75 with vortec's
GM's 350 HO crate engine is basically the same engine as mine but with 9.1 to 1 SCR and a flat tappet hydraulic cam with. It is rated at 330HP. These engines can easily make 375HP switching to a Comp 268HE flat tappet, a 750 carb instead of the 600 they are rated with and a good set of headers. I am running a Comp roller cam of nearly identical duration @ .050" as the 350 HO's cam, tighter LSA and more lift along with KB-118 pistons with a 22cc D-cup instead of the full dish piston GM uses in their crate engines. Factoring in the 12 HP or so loss from the 0.35 lower compression I stand by my 325HP estimate.