Good Job! I found a similar bearing problem. I bought a cheap used 88 Chev C1500 to use as a farm truck It had a whine in the rear end but thought I'm just going to be using it mostly on the property but I had to haul some junk for my Grandaughter it was heavy load long distance and all hell broke loose in the differential barely made it home. On taking the differential apart found the spiders all chewed up and the pinion bearings had a Timken race's and a Koyo bearings! They certainly were not a good match. I just found your youtube channel and I am real old Ford guy and from the old Gasser days will subscribe and watch your build come together.
