If you're heads have guideplates, and stud mount rocker arms, you'll definitely need a set of hardened pushrods, the stock ones won't work with the guideplates because they have a little ring around them which is too big for the guideplates.
You might also need a different set of valve covers to clear your roller rockers, or just modify the ones you have now. Just check the heads over for casting flash, etc, and you'll be alright.
Any header for a 302 should fit, same with intakes. The plug for the smog passages in the front of the heads should come with the heads or already be installed. Getting the ones out of your stock heads will be next to impossible. If you're not sure, contact the people you're getting your heads from.
Good luck with getting your credit from Excessive!
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