The T-2 unit description says on their site: T-2 (Type B) This differential is only a few years old and adds a wide range of torque bias coverage for the Toyoda-Koki Automotive Torsen North America, Inc. product line. This type of differential is referred to as our parallel axis helical (Equvex™) differential which was designed to accommodate Ford and GM C-Clip applications.
My friend whom I'm selling it for said that he bought it from another mutual friend who did have it in his supercoupe.