I’ve never had an issue with the thrust bearing with a powerglide except one time and it was my fault. Some aftermarket cranks (I’ve seen it with eagle and K1 cranks) are tight from the factory in the rear of the crank where the converter hub rides. I now test fit every one and if I don’t like it I take a flapper sanding wheel and give it a quick hit. I also go heavy on the thrust bearing clearance because of how high I leave off the transbrake.
