I remember Dr J complaining that Edelbrock wouldn’t remove the water cooling passage on the bottom of the intake runner. Speedmaster did so you would t be able to run his cnc pattern on Edelbrock heads without hitting water.

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