I just finished the mini rebuild on my 12 bolt rear end that is currently out of the car.
I am now ready to send it out to have a new posi/gears/bearings/bushings put in and am looking for good fair priced rear end guy.

A buddy at work with a 69 road runner has done buisiness with a guy at Wzorek Automotive.
He has nothing but great things to say about them.

Have any of you guys here ever done buisness with this guy?

I don't think you'll find a more experienced person in the area at all. Carl has been doing rear axle work at least since the early 70's as a Chevrolet Mechanic at Ed Nacke Chevrolet in Holyoke, MA. He did a set of OEM GM "High Impact" 5.13's for my 65 Malibu SS in 1972 and they never gave me a bit of trouble in all the street/strip miles that car accumulated. He is busy and scheduling may be an issue if you're in a hurry but he does do excellent work. You will probably be looking at around $200.00-250.00 labor. Good luck.