Is the original WD number 92032 ?
If it is, that is odd for a WD range that started with 92001 through 107000.
What is the Contract number on the data plate?
T16 MK-I 4.2" Mortar Carrier?
The bins in the rear compartment are for the 4.2" mortar, as are the brackets.
Normally found mounted over the engine, you may yet find the brackets for the bipod assembly, or vice versa.
The towing arms remain on the rear hull, less the hook and spring.
Note the full length sand shields removed, a boarding step replacing them.
The hull extension plates are likely factory installed, consistent with the date of manufacture. Straight spoke wheels were recorded as pre-1900 serial number, the Kelsey-Hayes discs began production late Sept., 1943.
If your engine has a TL number on it, perhaps the block is a replacement. A T16 block would show GAU vs TL.
How common are Canadian service T16's in Canada. I have seen one. Did Canada use about 750 T16's in NWE?
As you are far to occupied with a multitude of projects, drag and drop this at my place when you come east to collect the other 25 pdr. I will contribute to your fuel costs if necessary.