Is it necessary to replace the crown wheel bolts on 8-3/4 ?

IMHO replacing these bolts is not necessary, I have built several rear ends and reused old bolts, these units are crossing 300k miles with no problem. When I build an engine that has TTY bolts they always get replaced, but ring gear bolts are not TTY, nor do they torque close to 100FT LBS, nor are they reaching any kind of stretching while torquing, the use of locktite is something I do believe in, so I would definitely do that. I agree that it is quicker to build with new bolts, due to cleaning, but remember and extra $20-30 when selling a ring and pinion set is a nice average ticket boost for the seller!