My Dad has a 79 Ford F-150 4X4 and wants to convert the Manual to a C-6 Automatic. What can I expect and what will be needed to do the swap. The truck currently has a Borg Warner T-18 4 speed and a NP 205 T-case..... part-time. Oh yeah, it is the 8" extension housing between the transmission and the T-case. Help... ... .