Pistons are still available for standard bore 455's. Last time I checked a 400 had a 4.125 bore and a 455 had a 4.155 bore. Of course you need room for piston expansion and such so bore dia. will vary somewhat.
How much power it makes is dependent on the heads and cam. A larger engine will make power lower and more of it, than a smaller engine. Its somewhat easy to get 500hp at the crank with a 455, and 400hp is easy with nearly stock parts. First thing you need to do is figure out a budget of how much you can spend on it, then how much power you want. Learn as much as you can about the engine you are building, and get opinions from people who know what they are talking about.
Me I am clueless, I know less and less each day...lol. I need to forget all that chevy crap that doesnt apply....
|