I was debating the choice of originality:boringr HP . I think I am leaning towards HP. 454 blocks are probably cheaper anyhow???As long as the originals are missing, why not go ahead and use a 454 block? You can build it as a 454 or 496 and have a lot more power. A 454 block looks just like a 396/402, go for the cubes or you're liable to regret it!