I built this model many years ago as L&PS No 13, 15, 17 and 19. Those were ex PRR PK class coaches, 62 ft, for 60 passengers, wood sheathed. I think I worked from some PRR drawings but I can't say for sure how accurate it is. The model was then adapted and repainted for the WVN B&O route, BLE route, and CVP route and others.
I hope you can use it for your project.
Wayne