can't figure out witch drive shaft i need for my car.

i'v build an bec locost with ford 1.6 diff and axle's
so far no problems

I bought a 3.64 lsd ana a 3.14 non lsd
I made from those two a 3.14 lsd

first problem
- the original 1.6 drive shafts don't fit the lsd, the spline's in the diff are to short.

second problem
- I bough a couple of XR4 drive shafts they do fit on the diff but don't fit in the rear hub bearing's ???? somehowe they are thinner ???? they have also less spline's on the outside ????

so can some one tell me what kind of drive shafts will fit ???

otherwise i'll cut them both in half and weld the 1.6 outside to the XR4 inside

I think you need to either change the hubs to suit the new driveshafts or cut and weld the shafts you have to make them fit. The first options would be better IMHO.

GB Engineering can make you a set for reasonable money - that was my solution.