[Patrick L.]

Its a good thing to check the clearances and clean up the pan. I prefer to use plastigauge and set all clearances to .0015". I also like both shims to be the same thickness. When checking the mains I put a little up pressure on the crank to keep it tight in the upper bearing half.
You'll probably find the most wear on the center main and a bit lesser on the rear. But I set them all at .0015". The front main may not be worn at all or enough to worry about.
With the rods mind the orientation of the caps. Do one at a time as all the caps [ rods and mains] have to go back to the same they came off of. Don't mix them up.
Make sure there are no rust holes in the dipper tray. The dipper tray can be pried out or popped out. When all back together pour at least qt of oil thru the distributor hole to get oil to the dipper tray and valve chamber.
Check the oil pump for clearance and condition. Usually just flipping the bottom plate is all thats needed.
This is all after the condition of the bearings is found to be good.
You'll probably never have to do this again.