Get the book. It's true. It's in there. The 302 and 308 castings are swirl port heads too.......and the 302 head is technically not a closed chamber head. Quench, yes, but open chamber. The area around the plug is wide open. Look at the 273 heads. They were closed chamber. Look at the 516 and 915 big block heads. Closed chamber.
I have the Larry shepherd how to hotrod a small block mopar book I will most definitely check that out I guess I looked over that part or just didnt retain that part?
