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

If you approach the SBM 408 the same as how that SBF 408 was done, you should easily end up within the 550-600hp window.

For similar $$$, if you went the BB route, you could have roughly another 100hp.