I did some searching and now I'm more confused. Apparently older D44s have 2.75" diameter tubes, and the new D44s & 10b are 3". I'm swapping in an older D44 in place of the new version I have now (because of gear ratio). I have new u-bolts, but they are 3". I'm wondering if it will be okay with the 2.75" tubes. Or if I had 2.75" u-bolts made, would they work with my spring plates. I noticed Tuff Country lists the same front u-bolt kit for 69-87 1/2tons. Basically I'm wondering what opinions there are about using the 3" u-bolts on the 2.75" tubes. I would rather not have to get 2.75" u-bolts made now. Especially since I was planning to do the swap this weekend. EDIT: I am aware that one of the u-bolts will be 3.5" where it is next to the housing.