Anyone use these axle repair bearings?

I think I used something similar to that on a ford axle once, except If I recall, I believe they had their own inner race to replace the axle as the race. This caused the rollers to be smaller in diameter on the ones I had. They worked great and eventually I forgot about the repair...until one day I had the car (Factory Five Racing Cobra) on Brainerd International Raceway, for a day of driving lessons. The bearings survived but I blew the seals out on the driver side and diff. lube was everywhere. After that, I'm a little luke warm on them but these look like they may be a little different than what I had?