just did the swap on my car....D&D performance sells a kit to convert it with the shortened driveshaft, longer speedo cable and the crossmemeber brackets you need to move the crossmember back. its no less than $2,500 its a fairly easy swap and can be done in a weekend by the average gearhead. plus you can retain the use the factory 10 spline clutch assembly. the base T56 is rated at 440 ft lbs of torque...the Viper Spec T56 they say can handle way more than its rated, but that is a chunk of cash to be dropping down