Tom Hemphill has produced excellent numbers with B1-BS heads. My friends 68 charger (2800-2900 pounds)has gone as fast as 8.60's with 500 inch engine. These heads have to be opened up to max wedge size to make good numbers. I wish I could post some pictures of his car but the cars name is Tims Toy.

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time