70 dart 470 ci drag car build.

Sweet id love to have a set of B1 heads.
yeah I don't mind tearing stuff up to go for a little more, but I just need to see what this engine will do, with slightly bigger than standard ports and what I call a streetable cam, the lift is okay @.660-.674 but the duration is easily 10-12 less than it should have
Roger that. I do have the bug that when something does need replacement. "Why not go hotter?" Lol.

The B1s are nice. Plenty beefy for some impressive flow porting. 15+ years ago Edelbrock, Indy, Stealth ect couldn't touch them. But as you are aware. They closed the performance gap.