Doing a quick mock up yesterday D3 block fresh from machine shop, stock 390 crank turned .010 and .010. Fm125 bearings. The thrust bearings fit very tight in the block and the cap throw everything together for a measurement and I've got about .002 to .0025. Pulled crank and thrust bearings inspected deburred, resembled no change. Reset top cap few times smacking crank back and forth no change.
Crank spins beautifully but not enough thrust clearance. What is the best way to gain some, remove thrust bearings and sand a little on the front side? Do these FM125 bearings normally fit that tight in blocks?