I was thinking about going with 2"x.25" wall DOM. Seems pretty common for CA's. I would rather have a little more strength just to be safe. I would think though that 1.75"x.120" would work. Is there a noticeable strength difference in the two of those sizes?
I am thinking JJ's on at least one end. Would I benefit to have an adjustable one rather than a weld on one? How about if I had a JJ on one end, and an adjustable bushing on the other?
Would I want the bushing on the frame or axle? I would think axle because it's closer to the source of wear and tear, but maybe I'm wrong...