Out of interest what did you use to partition yours? Was thinking of a sheet of ply fixed behind the bulkhead
I used 5 inch wide pine plank screwed to the top of the bulk head to push the partition back by that amount and another screwed onto the Cab side/ roof joins directly above it across the body.
Then I screwed 1x2 batons at the cab sides and just to each side of where the cubby box sits, between the top and bottom Planks forming 3 areas. The area Behind the driver was clad vertically on the rear side onto the 5 inch planks, using..... Wooden cladding .
The centre area a piece of clear perspex was fitted so I could still use the rear view mirror.
For the area behind the passenger I made a frame which is removable to fit in the space which was then clad with the cladding. The area above the horizontal plank attached the the roof side join was also clad with wood.
I'm now in the process of making a centre roof console to join the top plank to the roof above the visors.
I removed the headrests, and fitted 5 inch thick foam , between the top and bottom Planks behind the driver and passenger to act as new head rests which is better than the old neck breakers, and much more comfortable.
The top 5 inch plank forms a shelf in the cab which will hold speakers.
I used cladding because its a lot easier to measure and cut short lengths and fit them, rather than measuring up and wrestling in a large sheet of ply.
I'll add I'm diabetic and feel the cold badly these days, so i still wear hat and gloves!!!
Must fit the radiator muff soon to get it all to heat up quicker.