i think this is it

302s are 62cc, They are a closed chamered 318 head. 308s are open chambers, 360 head.

Easy build, 360, KB107s at zero deck. .039" Fel Pro gaskets and a set of Magnum heads. 10:1, good quench, will run on pump gas. Use a comp cams Magnum 270 or 280 cam and a Performer RPM magnum intake. It will go high 12s with a good converter and 391s.