What can a 7 1/4 rear take???

ive had good luck sofar with mine, its also a limited slip 2.91 setup being pushed by a stock 87 gran fury highway patrol 318 and lockup 904. few burnouts here and there. Sofar all is well! ill be getting rid of it here soon for an 8.25 setup however, just because and i can, and id rather do it now then when i HAVE to....