Check out Steve Morris Racing. The guy specializes in big HP. I just watched one of his vids, 400ci SB 1200hp. I have seen some of his BB make 4500+HP. He seems to be the man for big street HP Too. Makes me want to by a Chevy. He had another vid with a mild 505 that made an easy 1200+HP. Check him out, he has a bunch of vids.