Mated to the modified AOD transmission is an Advance Adapters Atlas II 4.3:1 transfer case. St. Clair said the decision to go with an Atlas was easy. “The Dana 20 had to go after the second output shaft blew. For the cost of an aftermarket output shaft it was easy to justify an Atlas,” he says. The T-case routes power to the axles via a pair of Tatton’s Driveline Service-built long-spline driveshafts fitted with Spicer 1310 U-joints.