I just used the OEM adapter that came on my Shelby and drilled the adapter hole bigger and just slipped it on with my new shiftier. I used hot water to remove the adapter from the old ball.
2013 Vert GT500 Shelby Candy Red Metallic With Ingot Silver Stripes, CDC Light Bar, NAV System
Heated Seats, Redine Hood Struts, Side Scoops, JLT CAI Carbon Fiber Intake Tube, Project 321 Engine Caps
Interior Silverhorse Racing Door Handles,Magnaflow Axle Back Deletes Black tips,HRE 792R wheels, Michelin Pilot Super Sport Tires