318 heads

That’s true.

For a mileage exercise, I’d just use the heads that are on the engine. I did say if I had a choice of ready to run heads on a table waiting for me to pick up and use, but the money involved……

I’ll just use what I have and do well with it. It really is about getting the cylinder efficiently filled up, burning all of the air/fuel, getting it out efficiently.

A stock valve head well prepared is all you’ll need to do to your heads.