Pinion gear dropped four teeth! It was a type “0” from a 70 442 with 391’s. Found a guy who said he could locate a new ring and pinion. He located 3:42 gear set. I thought that would be much more drivable so I had him install them along with new bearings and seals. I’m very pleased with the outcome. I asked him where he found the gears for a type “0”, he said he’s got a good supplier.