stock or hv oil pump

Jadaharabi said

Thought the reason for removing the flashing be it in the lifter Valley or in the bottom of the motor or on the cylinder heads was to reduce the risk of a stress crack.

Personally I've only seen it happen to one block an that was a 273. It was on the front opening passenger side about 3/4 of an inch long.

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I just spent a couple of hours grinding on my 360 block (408) build I’m working on. Probably another hour to go then I will drill a few holes in the intake valley and champher them to aid oil drain-back. I see some 50 degree weather early next week so hopefully I can give the block a good bath. Dirty dirty work.