Unimates on the back, and right now the 1159 conversion up front. Eventually I'll do Z couplers on the front.
I mainly model Wabash at around the time of the N&W merger (1962-1964), and diesel assignments were pretty much anything goes on the power short railroad as long as there was enough horsepower to move the traffic.
That's a great thing to model for variety, but it also means that the neat AB sets and ABBA sets of F units almost never happened on freights west of Detroit during that era.
Jeff C