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

We say crown wheel, Americans say drive gear (or ring gear) and the service manual says to discard the old bolts when it is removed/replaced for service or ratio change or rebuild etc. Also I see there are many kits online with the new set of bolts.

So I am wondering how much stress do these 12 bolts take normally? The service manuals are not assuming the cars will be abused, but for normal road use? And isn't most of the stress on the bolts a shear force, rather than a tensile (pulling) force? My diff assembler said I will never break them - the car is a Challenger, engine a 400hp 340, nothing too serious. Although tyres are large, 295 Sumitomo's. The pumpkin is all assembled but still out of the car, I can still easily replace the bolts, but I just thought I would ask here, actually how important it is to replace them. And the main reason I would is because I don't know the history of this chunk, it may or may not have had huge torque through it in a past life. Thanks!