I have some questions bout my 20v/c56. first of all how do I tell if it has a lsd or not and if its not would it be easier to just find a c60 or c160 and swap it in?

The C(1)60 would fit better with the 20V, but are the weakest of all the gearboxes that'll fit the 20V

I've chosen to stick with my C52 gearbox, because of the strenght.

How you can see about the LSD? I don't know for sure, think you have to take the gearbox off, if you haven't done it already.

you see that its an "open" diff with the axles out of the trans. I've heard that the c160 is a weak gearbox.