Louis,
I agree, It is anyones guess how good they are anymore. The materials used to build them worries me. My 62 Chevy pick up is running on maybe my second set. They worked before but had scoring on the races. I take the time to clean them to dish soap & water to remove all old lube, let dry & pack by hand getting grease packed between each roller & coming out the other side. It’s a messy thankless job but I never worry about my stuff failing. Just common sense to do the best job I can for my own safety as it will run all day at 75mph with my V-8 & taller ring & pinion. Then a 700 R trans with overdrive. Much cheaper than a new truck to build one like Jeff wants it to be.
.
.