Forgive me my Mopar brothers. I have sinned

RustyRatRod said

Remove the rocker shaft on the Driver's side and put air to #8. I bet you get air coming out the exhaust pipe indicating a burned exhaust valve.

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Thanks for the idea, I never would have thought of that. Actually would be good if it was an exhaust valve, maybe i could just get away with having the heads rebuilt for now. I'll try to give that a try tomorrow.