8-3/4 Noise After Rebuild..What's Normal??

as a shop owner that is absurd to give you a non itemized bill. i can understand not showing you paperwork for a sublet job from thier shop, but not writing up a bill for you is wrong. case in point, i just had a 10 bolt rear in a 67 gto built for a customer. it was a sublet from me, so that shops receipt is mine, but i detail all that was done on MY receipt to the customer, including the brand of posi we installed and what gear ratio his gears were, since his originals were totally fine and didn't need to be changed. i guarantee my work and in turn i guarantee that sub job.