You better lay a gasket on the head to so if what you want to do is possible. That may be one heck of a restriction. I ran it the other way on my Duster

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