I thought of lapping compound also. But upon closer inspection it seems that the guy dropped the hand cleaner in the lifter valley.
In all seriousness it appears that the galleys were not thoroughly cleaned. Cam lube couldn`t have caused that. Maybe someone dumped a quart of contaminated oil in the bitch. You know, like the quart you dip the drill bits in! You know that tanks need to be cleaned also. If he hot tanked his buddies Scout rims before then you found the culprit.
Whatever it was it went through the entire system and it was a hell of alot of it. Thrust bearing was not the problem. Wanna know a neat trick. To set thrust bearing clearance just hit the crank back and forth from front to rear a few times. If it still feels too tight by touch then hit it a few more times. Oh, and rings take about 15 to 20 mins to seat. If someone tells you different then tell them to go read another ****in` book.
Tractor Pull,,,,,,,,now thats a read.