I checked out Chris Guenzler's travelogue of the trip, and he pointed out an A/B set of F-units stored at Schellville, as well as the units in the "cage".

Does anyone know the lineage of the two F-units, and what sort of condition are they in?

I also checked out the Google Maps view of Schellville, and it shows the two Fs parked on a yard track south of the wye and the "cage" along with five or six hood units that, from their apparent size, look like six-axle units. What is the story behind them, as well?

Thanks to whomever can provide the answer...