I love the look of the HD Swingback handlebar (part # 56039-03A) but the part catalog says it will fit the Street Bob but not the Superglide Custom (I own the Superglide). Does anyone know why that is, I thought they were basically the same bike? What would have to be done to make it fit?

 

They should physically bolt on without a problem.
The parts catalog is probably referring to the control cable & wire length. The swingback bars probably require longer than the stock cables on the SGC. Someone correct me if I'm wrong, I think the Bob, with its stock mini apes, already has longer cables.
I don't know, though, I have 8" high T-bars on my SGC, and cable length was not even close to being a problem.

Ken