Great to hear it turned out well Dave!
I never heard of the Delphi box prior to the posts here, but I did a Pontiac Trans Am box swap on my '66 years ago. The 12.7 ratio sure made quite a difference.
The last ps box swap I did was from a late 80's caprice cop car.... it required hose adapters from Lee Manufacturing, the original pitman arm to be swapped, and a 3/4" rag joint (IIRC) from a manual steering '66.
What was required to install the Delphi box?