Rack and Pinion switch

[Handfull 54]

I have a 54 truck with an original fatman crosmember 16" on center. I am switching to an 88 T-Bird power rack. I know I need the offset bushings or elongate the hole on the passenger side crossmember. The 88 unit looks different from my 76 power rack. Is their anything else I am going to have to change, like shortening or lenghthing the steering shaft. Please let me know if you have done this swap or have any suggestions. Also I use GM steering fluid and have had no problems. I am using a ford type rack just as I used with the old unit. Thanks for the help.