The 2 rail bulkhead flat car can not be converted to 3 rail unless you cut the skirts off of the end of the car that are next to the 2 rail coupler box. The bodies are different for 2 and 3 rail. The part number for the 3 rail truck is OBH021 they are in stock, I just ordered them. When you call Atlas ask for Bill at EX 7132 he can help you.
I'm confused now! I see the OBH021 listed on the parts drawing, but when I spoke to Steve at Atlas he said I needed a "70 ton truck with extended couplers", and that they didn't have them in stock.
If I order the OBH021 these will do the trick (after I modify the car)?
Bill