JMHO but if I'm considering going to the trouble of stroking a 400 and I can get 496+ cubes for about the same price as a 451, it's gonna be 496+. If all you have is the crank and no other internals, sell the crank and get a 4.15 or 4.25 stroke kit from your favorite vendor and call it done. Easy 500 horse on regular gas zero drama street/strip torque monster and it can look like a 383.

Kevin