How fast are you looking to go and with what budget. Simple good old dependable Edelbrock heads are easily flowing 300-310 plus cfm with porting. No leaks, no issues, and easy to find rocker and good intake manifolds.

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