i have used the stock u joints.I had a guy stop by the shop that work at saginaw steering gear just down the road a bit. he told me they are very strong and that the the joint will not fail before any thing like the body for the U-joint.I have used them were looks were not a big deal any thing is better than 1/2 stocket drive U-joints ? boy i should have not said that some rat rod guy may be using some or smoking a joint