SBM Edelbrock/Speedmaster Head Data

polyjohn said
So the port is 'too big' in the bowl area, and the pinch is kinda OK?

On the factory CNC head that I bought last year, I felt the bowl and throat were too large for a 265-270 cfm port. The pinch can handle that much flow with a little cleanup.

polyjohn said
A 1-1/8'' x 2-1/4'' straight port (like Dulcich Eddy) will solve the SM head issues once and for all???
Widen the pushrod pinch to ''slow the flow''...

Solve it? No. Still a lot of area needed at the apex and a short side to seriously re-work, especially if you are feeding a stroker motor.

And yes, PBR usually did 2 head bolt tubes and 4 push rod tubes.