Im trying to deside what heads i should trade my truck for. Got a couple deals worked. I can trade my truck for a set of Fresh Roush heads with 2.02 and 1.90 valves, they are cast iron. He will throw in a set of Valve covers with the heads but no rockers. Then i found a set of Elelbrock RPM alumiumn heads with crane 1.7 ratio roller tiped rockers that the guy will trade my truick for, they have roughly 1k on them. My combo is going to be a 306, with a ported cobra intake, 24lb injectors, Ill probly run a TF stage 1 cam or a Ford Racing E or F cam, not sure yet. I want to run alittle nitrous. Just trying to deside what heads would work better for my combo. What do you guys think would work better for me?