Hi just need a bit of information , I have a triumph herald 13/60 that i am converting to a Vitesse , i have already changed the chassis to take the rotoflex drive shafts and suspension. The problem i have now is the out put flanges on the diff are smaller than the vitesse drive shaft couplings. So can i change the out put shafts on the diff to suit the roto flex shafts? Also will the diff be ok, it is a 3.89 or will i need to change it and will i have a problem when i get an over drive prop shaft when trying to connect it to the diff. And advice would be greatly appreciated Cheers Nigel