OK, I think I have this figured out. I ran across a link on ebay from a well known Speed and Performance company advertising a Thunderbird rack:

POWER: Rebuilt power rack from 1982-88 T-bird. Also fits aftermarket Mustang II crossmembers. Bushings included. (Can be used with a Saginaw GM power steering pump without any additional valves or inline pressure regulators). Overall width is 45-1/8" with 15-1/2" mount centers. Must use offset bushings (910-34342) to mount to original Mustang II crossmembers. 3/4"-36 spline input shaft.

It requires the use of offset bushing to match the MII cross member which makes it a direct fit. I was searching on Advance Auto Parts site and found the same rack rebuilt by a different supplier for $53. I also found a 30% off coupon for Advance which brought the price down to about $38 plus core charge. I purchased the offset bushings on ebay for $39. Have to make sure it is NOT for the performance suspension. This one turns 3 turns from lock-to-lock, whereas the performance suspension rack turns 2.5 turns lock-to-lock which will still have a tendency to be very touchy.
I am going to take some pictures of the build this weekend and post them on here if anyone would like to see them. We are going to get the stainless exhaust installed and engine started before the cab is installed. Still have a lot of work to do on the cab. Once the engine is started it will be my turn to get some work done on my 29 Buick and the cab will come later. My poor old car has been sitting for 7 years while I have been working on other peoples cars. I would say it is time for a little payback.