I had a local machine shop call me to see if I could flow two Hemi heads for a customer. They had two different part numbers and he wanted to know if they could be used. They tested good enough for what he wanted to do with them.

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