The GN Man posted:FT A-units, as delivered, did not have m.u. connections on their front ends. I don't know if ATSF ever added them, but NP definitely did not and I don't believe GN did so, either. So, you would not see an FT m.u. consist in A-A-B-A, for example.
There must have been some GN FT's later equipped with nose MU. There's a photo in Burlington Bulletin #4 of a CB&Q F2 leading a 4 unit GN FT/F7 consist through Savanna, Illinois. After the CB&Q F2A, follows GN FTA, GN F7A, GN F7B, GN F7A. There's either nose MU on the FT or there were 2 crews used.
I recall occasionally seeing CB&Q/GN pool power coming out of Clyde, but I don't recall clearly what GN F's were used.
Rusty