I'd by Ryan's Fowler Patent boxcar - for my narrow gauge. The D&RGW standard gauge owned some of these, and when they needed new pipe gons for the narrow gauge, they cut the tops off and filled in the door openings. The side trusses were never rebuilt, so the diagonals didn't meet the verticals at the new top of the sides.
The NP radial roof boxcar would also be useful for my BN, but would probably end up in MOW service.