I rairly even bother checking exhaust flow numbers on my bench. My ears tell me more than flow numbers on exhaust side then I fine tune the air speed to get it where I want it.

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