Normal E30s, sure skid it, but a genuine 325 sport? Good ones for for ££££ nowerdays and they are getting rare regardless of what other people say, I'd fix it up, sell it on, use the proceeds to buy a normal E30 with cash to spare. Plus those 2-ways are pretty fragile and aren't very aggressive, you'd rather have a welder and it'd be a waste to weld up a 2-way so it'd be best to get another diff and if you're getting another diff you may as well just use a more basic E30 as a base. The nice kit wouldn't last long either.
exactly what i was going to say, with the money you could get for it with a ticket on it you could have a much more capable car.