Regarding the fitment of the spherical joint depends on the condition of nuts and bolts it is fairly straightforward.
It can be fitted to the wishbone while still on the vehicle but will require home made pullers to be manufactured ,
It will be better to remove wishbone from car as sometimes the old joint can be a little bit of a barsteward to press out,
Always clean out wishbone housing and circlip groove and copperslip before assembly .Make sure joint is fully in before
fitting circlip otherwise clip will not seat properly with dire results .
If any body has a problem for a small fee send me the joint and wishbone and I can fit together,
or send the car and the joint for a slightly bigger fee .