I have a set of big block Chevy heads that came off a 454 for sale. They are nicknamed peanut port heads but don't let rumor fool you. These heads are plenty capable of making all the power a 454 is capable of of, they're just not high rpm heads. They'll do everything you want up to 3500-4000 rpm. They were off a motor that was working fine. With some minor cleaning an prep they'll bolt on and run. The casting number is 346236. Gm2t passenger car heads. Call or text 7855676120. Thanks for looking!