I am located in Canberra ACT Australia, sorry for calling it a tailshaft should have said prop shaft I guess different places different names, anyway I have carried out some research on the Sprint I have and found out the following it is VA15334 on compliance plate and engine the differential is stamped VA15434 but the tailshaft sorry prop shaft looks like it is a 75mm diameter tube with one end having a sliding spline, there is small metal plate attached to the shaft which appear to indicate that it has been balanced when made. The body is fitted with a support flat bar bracket near the front of the Shaft that would appear to prevent the prop shaft from coming into contact with the ground if it should disengage from the OD gearbox. After talking to the local Diff doctor he commented that it was not uncommon to replace 2 piece shafts with remade 1 piece shafts because of the cost involved in rebuilding 2 piece shafts and when balanced properly there was no issues
Hi Geoff From Perth here and very common for sprints to run with a tail shaft from a triumph 2500. Mine was the same until I swapped back to correct 2 pieces prop shaft and took advantage of one being shipped out by Alun. My single piece went through UJ’s quite quickly and this got me thinking mod was more bodge than a decent solution. Post costs can be spicy be spicy!
Proposed exhaust system similar to the one we made for my Chrysler Valiant SV1