I've had several things done to my Mach 1 at Keane's Autoworks. They installed a Ported Intake, Catted X pipe, upgraded U-joints, and Underdrive Pulleys. I'm very pleased with the work and they didn't mind one bit about me bringing my own parts to them. The alternator pulley in the underdrive set required slight notching of the ridges on the alternator housing for added clearance, and I didn't communicate that to them because no instructions were provided with the alternator pulley (although the website said it in small print looking back). Nonetheless, they called up the manufacturer and sorted it out. This caused increased install time but they only charged me book time. The mechanic's name who has worked on my car is Orazio, he's been good with communication and is a friendly guy. I definitely recommend going to this shop if you're in the Westchester/lower Putnam county area! And if you look at their parking lot, they work on pretty much everything.
KEANE'S AUTOWORKS INC
Regards,
Matt
KEANE'S AUTOWORKS INC
Regards,
Matt