acl race bearings are the best bearings you can buy..they take alot to make them work perfect they will outlast stock bearings...but you must have a SPOTLESS crack to use them and i would not use them on stock rods only hbeams"but thats just me"you CAN NOT TOUCH THE BEARING WITH YOUR FINGERS AT ALL!!!!!and your crank must be polished and within spec...but as for them lasting your info was wrong they will last..