Originally Posted by rdunniii:
One can always run F3s and F7s together. After about 1956 SF broke up the ABBA sets and did it all the time.
Really? Where did you get this information? I have seen thousands of Santa Fe Passenger and Freight trains between 1956-1962 being pulled by F3's and F7's and I can honestly say that only once did I see a mix of 3's & 7's. The lead A was and F3 and the one B was an F7, and that was in the Blue & Yellow freight scheme.
Please post some pictures if you got 'em.