When ab 8 3/4 breaks................????????

I have broken/seen broken hundreds of rearends over 35+ years of doing this. most common is broken gears. they are expendables ie they do not last forever. second broken main caps/bolts. my car in pic ran 8 sec 1/4 3000/bs gearset would last between 150-200 passes. 8 3/4 with strange axles and spool. us gear 4:56 ratio. billet steel cap on lh side. usually lh breaks first and takes out rh side. you either need a billet cap or the new nodular cases that I/doctor diff/moser carry. make sure it has the heavier 9" style caps not the original looking 8 3/4 caps. had the best luck with us gear, and motive gears, but us gear is going to all gear sets being 2 cut as opposed to the odler 5 cut system, questions in my mind about durabilty??? stay away from chinese junk gears/beaings/spools. had a new spool from name mail order company the ran out by .012 acceptable is .001-.0015. lots more to it but limited space.paul