well I removed the intake manifold today and removed the intake gasket, the one with the inserts to block the exhaust crossover. It seemed to me that it may have been sucking air on both sides of the insert from the opening where you can see the push rods, don't know exactly what those openings are called. I put on a new gasket that had the openings and then covered the openings with a very thin piece of aluminum. Put it all back together and the popping was still present. So there is no other cause of the popping other that sucking air?? Could it just be the result of having no crossover exhaust. My exhaust is stock except for it being 2.5" vs 2.0" pipes.
Thanks for your help.
alan
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