have you had the crank mains checked for straightness or align bored? just because all of the rods arent going bad doesnt mean the block isnt out of alignment.
if its spinning bearings, id look at the oil passage ways in the crank and block as well. could be a blockage closer too the front galley and restrict oil to bearing #1. just a couple thoughts.
wish i lived around where you are. there isnt a 1uz, rb25 or 2jz of any kind around here for less than 2500.
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87 toyota 4x4 single cab short box pickup, 7MGZE.
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