I've searched, and while there has been some discussion on this topic, there never seems to have been a firm answer to the question. I have a 79 Dana 60 front axle, and a 14 bolt rear. If my understanding is correct, the Dana 60 should have 3.125" tubes, and the 14 bolt 3.25" tubes. What size U-bolt is the right ones for these applications? I'll be doing a U-bolt flip on the Dana 60, so the spring plates will be on top. Anyone have a firm answer on this?