I dug out my Z tankcar just to see what it would take to make an N scale car from it. One would probably be better off scratchbuilding the thing. The kitbash could be done, and the car would be usable, but everything on it is wrong.
For starters, it's an old design riveted tank, with the inset ends, like the Atlas/Rivarossi "chemical" car in N scale.
The dome is wrong, as it should have the chemical style, not the round common-liquid style.
The frame is far too narrow, and would have to be replaced, walkways, underframe, bolsters and all.
Finally, the entire car, except the two removable ends and the brakewheel, is a one piece casting, so replacing anything would require a lot of carving and filing.
On the plus side, put MT N trucks under it and the body mounted 903s are at the right height. The bolster holes are too small for N truck pins, but that can be fixed several ways.
Not at all an easy kitbash, unlike mine from years ago, for an auxiliary water tank for my narrow gauge rotary. Put MT Nn3 trucks under one of the MT 39 ft tankcars and the couplers are the right height for Nn3. It looks very odd, but then, a prototype standard gauge tank on narrow gauge trucks also looks odd.
