My T56 sits at the factory angle. Length is a little longer than an 833. I scored mine for a good price. The Magnums have wider beefier gears,an internal oil pump,dual speedo outputs and multiple shifter locations among other thing. The trans in my car is the best of the factory T56 derived pre-tr6060. 08 and newer Vipers use the TR6060 which is basically a T56 Magnum but without the multiple shift/speedo options.