Here's spome more specs. Don't know if it will help you or not.
550 lb-ft Torque Capacity
1.125 x 26T GM Input Spline
30T Viper Output Spline
Close Ratio w/ Deep Overdrives(2.66/1.78/1.30/1.00/.74/.50)
Carbon Fibre Blocker Rings
Steel 3-4 Shift Fork
Precision built and blueprinted by D$D technicians
Direct bolt-up to GM Saginaw/Muncie/T10 bell housings
Direct bolt-up to McLeod 8630 series steel bell housings
Accepts stock GM clutches,linkage,T.O.B.,pilot bearing,trans. mount
7T GM Mechanical Speedo Drive or Electronic Speedo Drive
BA1 Ford 5.0/5.8 440 lb-ft 2.97 Wide Ratio(a) $1999
BA2 Ford/Viper 5.0/5.8 550 lb-ft 2.66 Close Ratio(b) $2499
BA3 Ford 4.6(Mech.Speedo) 440 lb-ft 2.97 Wide Ratio(a) $2199
BA4 Ford 4.6(Elec.Speedo) 440 lb-ft 2.97 Wide Ratio(a) $2199
BA5 Viper 8.0 550 lb-ft 2.66 Close Ratio(b) $2299
BA6 Chevy Small Block 440 lb-ft 2.97 Wide Ratio(a) $1899
BA7 LT-1 F-Car(94-97) 500 lb-ft 2.66 Close Ratio(b) $1999
BA8 LS-1 F-Car(98-02) 500 lb-ft 2.66 Close Ratio(b) $1999
BA9 Ford/Viper4.6(Mech.Speedo) 550 lb-ft 2.66 Close Ratio(b) $2499
BA10 Ford/Viper4.6(Elec.Speedo) 550 lb-ft 2.66 Close Ratio(b) $2499
BA11 Chevy/Viper(Mech.Speedo) 550 lb-ft 2.66 Close Ratio(b) $2499
BA12 Chevy/Viper(Elec.Speedo) 550 lb-ft 2.66 Close Ratio
(b) $2399
Here's some install kits
http://www.ddperformance.com/T56 Kits.htm
As you can see there is a ton of variations of the t56. Maybe call up d&d and see what they have to say.