h.p. gain question on a 454

[carl f]

so i am dealing with a 73 motor to start with. still stock bore . we freshened it up a little with new bearings, rings, voodoo 60203 cam & lifters, a 850 holley with a air gap intake & hooker 2241 headers to cover most everything. re did guides & seals & replaced the springs to match the cam & a hei dist. anyone care to give me a idea on what kind of hp i will gain on that motor? i believe stock it was 280 hp/360tq. thanks

 

[carl f]

wow, no one wants to give an opinion?

 

[turchiac]

Im no expert but i would figure at least 375 to 400hp and close to 500 lb ft. What is the compression?

 

[carl f]

i know this is going to sound stupid but i haven't no clue. stock i woulod guess. bore is still 4.25", block wasn't decked, heads weren't milled down & pistons (flat top) were re -used from a very recent rebuild where the prev. owner had the crank reground 20 thou's.