Rebuilt 360, excessive oil consumption

Pulled intake today. All ports had an oily sheen. Tops of the intake valves were heavily carboned. The intake gasket bead was compressed on top, but, hardly at all on the bottom. I took a picture of the gasket at the #5 and #7 ports. You can see the bead is nearly intact on the bottom. What caused this? It was that Chinese intake I bought off of E-bay. It's NOT going back on. My engine builder is sending me an iron manifold to try. He is hoping the low compression on #8 may be caused by carbon buildup. He also said to go to a #72 jet on my carb. He thought it was running a little lean. Are we having fun yet?](*,)

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