One way to know without pulling the motor apart is to send a sample of the oil out to a lab like Blackstone.

A quicker , cheaper method is to pull the filter off and cut it apart and look for chunks of bearing insert. If you see pieces, the entire motor will need to be gone through.

If the filter looks clean the lab would be a good second test.

Kevin

87 Turbo Intercooled Raider, roller cam, torsen rear diff, LSD front diff, lockup auto with modified converter, V6 brakes, low transfer case gears...