Looking for the following KMT/Kusan (Franklin, Tennessee production) boxcars:
KMT #9011 New Haven 36406 black/orange/white checkerboard car (not the solid orange car that came with the same number 36406)
KMT #9010 Missouri Pacific 120119 Eagle Merchandise Service
These are 1950s production cars which are slightly larger than Lionel's 6464 series cars, ride on diecast frames and have operating couplers, not later issues from Kris Model Trains (also referred to as KMT).
Will buy outright or trade, empty boxes also of interest if you don't have the cars - I have lots of AMT/KMT duplicates available to swap, Thomas Industries 4-4-0 and tin passenger cars, postwar Lionel available as well.