Marine 273 build

Yep, sounds like 302's are the most readily available, small chamber, decent flowing head out there... so I will start shopping. Not many junk yards around here carry stuff more than 10 years old, unfortunately- so finding stuff thats 25+ years old might be a challenge.

There are a few head gasket options listed on Summit with a compressed thickness <0.030"... though theyre all larger bore. Still, better than a small bore, thick gasket I suppose.

65Dart, I did read that thread you linked a while back and will be forwarding it along to my buddy who already has his Egges in hand. I have a hard time seeing how going from 675 heads and factory flat tops to 315's and domed pistons wouldnt make it a piece of cake to gain a point of compression, but I suppose the math is what it is! Im sure some milling is in his future, as he was planning to have the 315's ported anyways.

For my build, Im keeping the factory flat tops and trying to break into the low-mid 9's for CR, if at all possible.