I have had a go at this in the past I am still not fully informed!
http://www.mapleleafup.net/forums/sh...ight=predictor
I believe that the correct designation is C.8/AT, and the rebuilds were made by Morris Commercial Cars Ltd at Adderley Park, Birmingham at the end of 1943. Some former /MG and the later Portees ended up as 17-pounder tractors, and some were converted to airportable version. I cannot imagine that any C.8/P Predictors were converted to the 'normal' 17-pounder tractors but it is possible! I assumed perhaps incorrectly that all were converted to airportable versions. The differences in the original models pre-conversion were considerable, with the front and rear mudguard design most obvious: round or flat-sided.