What do these bearings tell you?
 

Anything?

dirt,iol thin and crank/rods clearances need to be adjusted and trued.

What about the diagonal/ crosshatch type marks?

scrotch biting out the poor fit.

Someone removed bearings rubbed on them with scotch brite and reassembled.:popcorn:

x 3.

While we're at it.

I think sutphen 30 wins the prize. I didn't want to prejudice the response but the mains in the block were about 5 thou too big (but then why were they scotchbrited?) and hadn't been aligned. We were also guessing the scotchbrite clearance job and I recently switched to a lighter weight oil. Shouldn't have been any dirt though unless it got there during assembly or debris from the damage or possibly a used oil thermostat housing that was put on.

I have heard of people sanding a little off the back of a bearing to gain a few ten-thousandths in clearance, but to my limited knowledge it is a big no-no to sand the face of them.

If the mains in block were 0.005" to big scotch brite would make it worse.