There was never EVER a vacuum disconnect Front 44 for a waggy.
Here is a printout from the tech section at IFSJA.org showing the front axles used in the full size Jeeps. Note the last one listed.
AXLES
Front Axles
Model Year Availability Notes
D-27A 1962-70 Wagoneer
D-30 1971-73 Wagoneer
D-44 1962-88 All J-Trucks, 1974-92 Wagoneer/Cherokee/Grand Wagoneer
D-44 w/vacuum 1983-84 All except J-20 With Type 1 NP 229 or NP 228 transfer case disconnect