I guess it depends if you can wheel spin away the torque, a good lsd is so much better than an original if the original is tired and lost a lot of its locking. Many people do break boxes but some do rolling burnouts and big launches. Rod went over to tremec as the t5 wasn't up to his monster power (with jag diff)

My 4x4 box was really low miles but it died after only 250 miles with over 400lbft (it actually has near 500 but Mark Shead gave it back to me on low boost only and said to get a new box on order, (I think he killed it mapping 468.1bhp lol). It broke very quickly.