A chassis for the SJP 31ft McKeen bodies and is designed to use a NWSL Stanton drive to power the McKeen without having to find an HO donor powered chassis [uses NWSL P/N #1220, 4'6" wheelbase, 24" wheels and SJP-TK03 side frames].
Or it can also use an SJP McKeen rear truck SJP-TK02 (or a Bachmann On30 passenger truck) to make a display model or unpowered dummy railcar. As an added feature, with the mostly flat floor there is room to model the interior too.
Shown with SJP-TK01 and SJP-TK02 trucks.