My postings in this thread apply to the Borgeson modifified Delphi steering box. This is what I installed in our Challenger some 2 ago. Uncertain which box OP is dealing with.

It is my understanding that Borgeson subsequently has moved to some generation Mustang derived box for Mopar,,,,and possibly for other models of cars.

I have no experience with this box. Understand that it a bit smaller.

About a year ago I installed in our 55 T Bird a Borgeson box that was designed for the larger mid-50's Ford sedans. They have not manufactured a system for T Bird. Turned out to be a real pita, but now is working very well,,,particularly being able to eliminate the leak prone slave ram cylinder system with multiple hoses that both Ford and GM used for many years. A vast improvement in drive ability.

Also have a Borgeson for our 71 Vette. Not yet installed.. Should go in with little drama as this is a very common swap and reports are very positive on it.