There are 4 heads. Two have old style chambers two have flatter chambers. Two have big ports 1 3/4". Two have small ports not 1 3/4". Old round chamber and big ports =270H head. Flat/D chamber and big Ports =302 head. Flat/D chamber and small ports = Later 270 and maybe 248 head. The other one is everything else. Patricks catalog has the casting #s and photos.
Those rings look like the ones I made. They work just fine. Sounds like a good eBay deal.
Last edited by Beater of the Pack; 11/01/12 03:45 PM.
