Mopar [HEAD] Aches PLZ HELP!?

Hey folks, kinda new to building engines, as this will be my first engine build, here are the specs, got a 74 318 block bored .030 over, keith black silv-o-lite flat tops, Comp cam 260H cam, holley 600CFM vacuum secondary carb, dual plane manifold, and 74 360 smog heads, nice valve springs for the cam, nice lifters and rods, but my question is, what kind of heads SHOULD I have? From what Ive read, the mid 70's 360 heads on a 318 SUCK, I dont realy know, so Im asking what the best STOCK mopar heads are for my set up? More horsepower = more better :) . I hear tell story of X Z J U O heads etc. and then numbers like 915 etc., tell me what heads I should be scaviging for,only looking to spend about $200-$300 MAX! Only gittin paid $200 a week, and 16 year old insurance.. well.. sucks. There are a few local auto yards, tell me what I need! I am willing to get some shaving done, and port n polishing is no biggie. Ill post my head casting #'s and you all mite be able to tell me if it should stay or go, from what you know now, what do I need?