A high volume oil pump draws a lot more HP to run. Even with the Sanborn (RIP) oil port mods. You are trying to suck more thick oil thru the same size 3/8 ID straw pickup.
Better bet would be a standard pump with a new Kevco type pump cover that is a 5/8 ID pickup.
Then add a Crank Scraper to your pan to scrape most of the oil off the crank, not all but most. Even better is to add a 'Power Port" to the pan just under the Crank Scraper.
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