This is a kit to build a PRR G39 ore car, less trucks and couplers. The cars are entirely 3D printed, and come with the parts to configure the kit as either an original pattern G39, or the later pattern of G39A. And depending on what you source for your trucks? You could further configure these as variations of the G39B.
The car pictured is the final finished sample from the project. The trucks under it come from Wit and Wisdom models, and are 3D printed trucks themselves, and the final paint and weathering was done for us by Al Judy.
You'll find the current instruction packet linked below from the Lambert Locomotive Works website;
https://storage.googleapis.com/wzukusers/user-34806640/documents/bcf97825d3074e04a0d4ce5e3e7e4523/LLW%20G39%20Instructions.pdf