Heads for magnum

dusterboi89 said
I’d like to make 550-600hp I had a 408sbf built For my dad and it made 615 on Engine dyno with 93/110 fuel mix I believe it was 12:1 compression with Victor jr heads So if I can get close to that it would be great for if not I guess I’ll go 440 for my duster

Sounds like a doable goal, I would refer to someone like @pittsburghracer for a combination. Also I know Mike a B3 is working on an engine he is hoping for close to 650HP out of. I could guess, but I would rather trust someone with experience for a good combination.