If you want a Horton Chair car, look at 0452 on the Cumbres and Toltec... it was built as a Horton Chair, (no 24) then rebuilt as Pay Car F before being wrecked on the RGS in 1909 and replaced by a new car F (now Cinco Anamas) and being rebuilt as a work/outfit car. As a chair car it was Tuscan with black trim.
On the issue of trucks... D&RG called its standard (as of about 1885) passenger car truck the "Pullman Truck" presumably because the D&RG truck was patterned off of the Pullman truck. It is a basic wood frame, pedistal type truck, with iron or steel plates over the wood. The D&RG used a wide variety of wheel sizes on passenger trucks until then standardized on 26" wheels... A 30" wheel only raises the car body 2" (half the diamiter of the wheel) not the full 4"... the lowering program c.1920 included smaller wheels, but also new body bolsters, further inset into the car body, new truck bolsters with side bearings at the side sills, as well as new straight coupler shanks to maintaine coupler height. Some cars had their truss rods changed durring the Lowering process.
Car 0452 was lowered, including new body and truck bolsters, long after it was conveted to a work car... and recieved new truss rods... so be aware that even artifacts can confuse...
Randy Hees