Usually overall strength of the spiders isn't the problem, it is the exteme speeds that they go through on single track burnouts or behind a car with lots of power and the ol' uni-track. By locking them together with the LSD, both tires spin and the spiders do not. Regardless, if you stick with a single track whether it is the r200 or a Dana 60, you're going to tear up the cross shaft and spiders unless you have some sort of locking/limited slip diff. If diff was the weak link, either case, ring and pinion, or half shafts would be exploding/imploding. FWIW, I'd score an LSD from the 87-89 turbo car or just suck it up and get an aftermarket unit setup for your car. Reider Racing says they should have them by the end of the month...