Going back to your first post, did you and pops do anything to the 350 that would make anything other than stock? ie camshaft, headers Was anything borrowed from the 4.3l particularly the throttle body w injectors? What I'm alluding to is if your engine is bone stock and you're using the correct 350 throttle body, you shouldn't be seeing those lean BLMs of 145-160 and it's a physical/mechanical condition rather than a tuning issue.
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