This site is great huh....I read all the info on your build as well to get me where I'm at now as well.
I going with adjustable UMI 4 link and adjustable panhard. I bought some springs and air bags from a member, so with adjustable shocks, I should be pretty well set up for the 1320 ride. My '63 Belair frame has been partially assembled for years, so it was the perfect opportunity to practice on it first, so I decided to add an additional stock upper control to it since it was pretty convenient sitting there with no body on it. I cut the bracket off a beater rear end I had, and fabbed it on and used the old upper control arm. Getting the right profile on the bracket to the axle seemed like the hardest part, but now, I should have a good template for the '62 now. I got a after market bracket for the UMI setup.
Attached are pic's of the added stock upper control arm.