Az diff narrowed a axle for my s10, my bro said they did a shitty job that it look like when they welded it back it wasn't straight. but other than that it worked fine
they just put a posi in noe of my customers trucks. He got home (kingman) and said it had a horrible vibration. Took it to a shop up there and they said the posi was installed perfectly but there was alot of wear inside that they should have noticed and the customer would have paid to have fixed.Instead he had to pay to have it al taken apart again in kingman and fix it. Their work was good though. I had another guy narrow mine, if you havent had it done yet let me know and I will get his number. Mine came out great and was $545 with new heavy duty axles.
Talk to Henry at AZdif 623-330-9482, he did my 65 Impala SS (narrowed to fit skirts while laid) two of my 96'SS's (one narrowed one just gears) and my little superduty (gears) about 6 months ago.
Nate's the owner of AZ diff, He dose all mine. Colorado, Escalade, Tacoma, mikes f150, explorer, rancharo, Dually, 2 9" fords, older 12 bolt, and s10. The only problem I'v had was the Tacoma axle seals leaked.