My take on the oiling system crossover tube for the small block

Jadaharabi said

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When you pulled the pan was the oil pump flat against the rear main cap?

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yes it sure was from what I can tell. I have .020 thousandths clearance from the main cap bolt to the oil pump body. Plenty.











I'm gonna replace my rear main seal, put on that other oil pump, and button it up. I will take note if there is a gasket between the oil pump and main cap, is that absolutely necessary to have that gasket there?