Managed to get the rear pulled and disassembled this weekend. Used JM 35 Sedan method to remove the spring, worked stellar.
Between the transmission, torque tube, rear diff and axle housings there was around 1.5 gallons of gear oil and grease. Majority in the rear and torque tube.
All the seals are original, well worn and due to be replaced. Inner axle/ bell end of torque tube.
My next dilemma is the modified roller bearing race in the bell end of the torque tube. Came across a thread Tubby had the same roller bearing race in his unit. Hoping to hear back from him as to his solution.
https://www.fordbarn.com/forum/showthread.php?t=209034)