[Richard in Anaheim CA]

You might try painting the inside of the side cover with Glyptol. It is a motor winding product but has been used by racers for years to seal porosity and also facilitate oil drain back to the pan more quickly so it doesn't stay up in the heads and starve the lower end at high speed.

I was talking to Dan Price on the phone several years ago and had checkbook in hand to purchase his "Improved Cragar head" until he called me a Bozo for asking some questions I felt were pertinent to the head before I shelled out the money.

Richard
Anaheim CA