Can anyone have, or put in a SADEV SL90-20 trans for a GT40 car just for track? I believe some GT40's have the SADEV SL90-20. The ZFQ/RBT ZF has had too many failures on my car and like many other's, who have experienced the same fate from using the ZFQ/RBT ZF. My car has a 302 Windsor, Webers...