SJP.Ca401C Southern Pacific narrow-gauge caboose 401 passenger roof-pre 1952 rebuild-

On3/On30 or HOn3 model of Southern Pacific narrow-gauge caboose 401 with the passenger car roof (pre-1952 flat roof rebuild). This model represents the later era of this caboose, including the slightly drooping end steps and mis-matched baggage doors. The HOn3 version does not include molded on handrails but does have the end rails and ladders.

Use scale 2x6s for the roof walk. For O scale that would be Evergreen #136, .03x.125 or Northeastern Scale Lumber OSCAL26P. For use HO Evergreen #8206 2x6, .022x.066 or Northeastern Scale Lumber HOSCAL2611

Trucks: 

On30/On3 (this is where things get complicated). The standard version uses the freight car trucks like Western Rail has 4'6" Thielson swing motion trucks, P/N #Tr17 available in On3/On30 or Bachmann standard freight trucks. For the Western rail trucks San Juan Pacific SJP.Ax36 "leaf spring inserts" will make the trucks match the prototype closer.

If you want to use passenger style trucks choose either the "Bachmann style chassis" for Bachmann On30 passenger trucks or the "generic truck chassis" for trucks like the Wiseman Carter Brothers passenger trucks in On30 or On3 (or equivalent). 

HOn3 you should be able to use any freight or passenger trucks, but they may require shimming or filing the bolster for the correct coupler height. 

The On3/On30 version uses Kadee #803 or #807 couplers and 2-56 screws (or equivalent) to mount the body. The HOn3 version uses Kadee #714 and 1-72 screws (or equivalent) to mount the body.

NOTE; like all SJP models, the fit between all the parts is tight. It is easier to sand something to fit that try to add material to make up for a loose fit.