For heads I would use anything from Dart to Brodix. Their the two most used heads in drag racing today. As far as the nitrous I wouldn't spray a two-stage in your motor unless you like rebuilding motors alot. you might be able to spray a small two stage shot. Just my .02. Good luck with it.
Eric
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68 Camaro
Gene Fulton 632ci Two stages of Jug
8.41 164mph Rockingham 1-26-03
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