Don't have a clue what your budget is. But I have a pump gas 455, that I had built by a member here. Was gonna do some bracket racing with it. But, the track closed & I sold the roller.
It has forged rods & pistons, with 6x-8 heads, which have stainless valves, CC 1.52 roller tip rockers, 7/16 studs with poly-locks. Has a Torker 2 intake with a 750 vac Holley carb, and a Flowkooler alum water pump.
All it needs to make a good street engine is a smaller cam. It now has a CC 292 Magnum(I was told), with Rhoads lifters. I think the idle is a little to nasty for a street engine. With something like a Summit 2802, it should make a great street engine.
Will sell as is, picked up here, in North Louisiana, for $3000. Most guys can't even buy a forged shortblock that cheap. And the head cores + parts & labor will cost another $1000.
It will have about 400hp/500torque, or a bit more. It WILL require a good trans & rear end. Hey, it's just one option.
Email:
speedbarn455@gmail.com if intersted.