CHECK the 90 degree intersection where oil turns up to the left lifter galley. Found my current factory block was miss drilled/aligned. Restricted. Took some serious drilling from both directions to clean up the intersection. Now the oil sort of snakes through there.
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Bull Nose Formula-461, 6x-4, Q-jet, HEI, TH400, 8.5 3.08, superslowjunk
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