Here is my good head ready to go to the porting shop. I'm going to use narrower 11/32" valve stems as well. Lighten the valvetrain up a bit and add a couple cfm. I was tempted to go to 5/16th but opted not to.

You can see where it's been shaved to get a true 12-port versus the picture in the previous post that the divider between intake ports leaves about an 1/8" gap between the divider and gasket.
Rebuilding an OHC Pontiac 250 with EFI and a Turbo