.002 Undersize Main Bearings

The fueler crank I was trying to use was used to running 60wt oil, changed every lap, so it had HUGE bearing clearance. With .001 under rods, and .002 under mains, I still had .0035 on the rods, and .004+ on the mains. I could get good oil pressure cold, or hot, never both.
I now shoot for .0025 rods, and .003 mains on my big blocks. You know what they say.... build it loose, and you will know, build it too tight, EVERYBODY will know!