Yeah I'm also running the heads and like them a lot. All with no port work. I would look into some other heads for a 347. I think the heads will work well with a supercharger although they make a badass NA head. And the nice thing is it'll run well with out the supercharger.
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89GT,T-5Z, D.S.S. 306 shortblock w\main support, B-303 cam, Cobra intake, GT40P heads, 1.72rr, MAC "P" headers, MAC off-road H-Pipe, MAC true-fit w\tips, 373's...and the list goes on!
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