You can also try D&D Performance (http://www.ddperformance.com/), West-Tech Auto (
http://www.westechauto.com/index.htm), and B-Body Performance (http://www.bigfastcar.com/) all of whom sell and work on T56's. John Donato from Donato Engineering (in Flordia) can convert your output shaft to the viper 31-spline style (with a larger bushing as well) if needed.
