Hello Mark
If… and that’s a big if…..there is ever a show or club meeting with more than one MGTD replica even close to home here, I would be glad to work on some I.D. short cuts. Chance of that is pretty slim considering the fact that mine is the only one I’ve seen in a 100 mile radius.
My Classic Roadster Duchess is a front engine Ford with a Chevette front and rear end, so if others had as many combos as they did, the Identification problem would get real hairy. Maybe some old brochures would help but I doubt it.
Anyway, although it’s hard to get details on these old babies, I think looking for the info is part of the fun! 
Ringo