84 F-250 extended cab 4x4 with rear duals off 79 dually. 7L Navistar (long before the Power Stroke). 4 speed manual with electric splitter from 86 F-600 dump truck. The tranny is what really takes the cake. The splitter is not like a semi where you run the grears and split then run them again..... you run the gear, pull out, split, then run the gear again, pull out un-split, and repeat 4 times. It pulls like a mule, but tops out at 65mph running 3400r's