Install new rear end gears

[grrhjr]

I'm looking for a qualified mechanic/garage to install the 3.73 gears I purchased for my 2008 Mustang Convertible. I'm changing from 3.31's to the new Ford Racing gears. I have also purchased a cold air intake kit with the new programmer. Last year I installed Flowmaster American Thunder axle back exhaust. Wow what a great difference in sound. I understand that you need a very qualified mechanic for the gear swap to eliminate noise etc. Any suggestions ?? I spoke to Keller Ford, they said they could do the work but 
the service writer did not act that confident. Thanks, [e-mail]

[staing]

Heritage Service Centre 1044 Scribner 454-8104 talk to Jim or Tom they're Ford guys and they're club sponsors. Tell them Chris Stawasz from the Mustang Club said to call. They're good and good guys. Call/text me if you have any questions 454-0673. Or email [e-mail].