As there is so little material out there on the Holliday’s pilot truck, what I’ve made is pretty much a guess of what it would look like based on contemporary sources and a few known major dimensions.
The major shapes and look, I think, are at least correct: the flat equalizing bars, the leaf springs, the axle boxes, the squared pedestals. These parts were drawn from the original Holliday drawing. The truck’s profile shows these components:
