906 heads on non-hi Po b/RB engines?

[Yellow Submarine]

Were 906 heads installed on regular as well as Hi-Po B/RB engines or just Hi-PO.? I have a 383 replacement engine in my Challenger built Oct 70'. The 906 Heads on it were also cast Oct 70'. Not sure if the exhaust manifolds are standard or Hi-PO.

John

[rUNCHARGER]

906's were pretty much standard fare on Psgr 383s and 440s from 68-70. The HP manifolds came on standard 383 B and E bodies 68-71 as well.

Sheldon

[Yellow Submarine]

Thanks Sheldon

John