318 with 360 heads

Welcome to the site FrankenDuster74...get ready for a ton of different opinions. J heads on a 318 is a pretty common question. I'd recommend you get familiar with and start using the search function-not nit-picking, just trying to save you some time from waiting for replies...although this one should receive a few ;)

I'll add this much first off, if you don't have anything else, and you want to save a couple $, you can use the J heads; but you need to shave them to maintain any compression. Just bolting them on a stock 318 will drop your compression somewhere between a half and a full point. If you have some ends to rub together, I'd recommend selling the J heads to someone who wants them for a resto and buying a set of complete Magnum heads (with rockers) and buy the appropriate pushrods intake and head bolts then use them on your 318.

If you have more spare cash than that, find and buy a fully dressed out and running 360...there are members here running 10s in Dusters with 360s...lots of mods, but 360s are an easy base to build from