[car4jim]

Go for the Kirkham and get the original differential. I have KMS563, the 427 SC version. The car is awesome!! The workmanship is incredible. The car is literally a work of art in polished or brushed aluminum. Kirkham usually have a package deal that includes many options including the aluminum salisbury style diff and half shafts. The Kirkham Bros are great to deal with. There customer service is great. They go out of there way to make sure you are happy with your purchase. I'm not sure on their pricing right now, or if they have any package deals brewing, but I you will be very happy if you go with KMS. Any questions on the car, feel free to throw it out here. There are several Kirkham owners on Club Cobra.