They do?
the only parts in Dragons kits that are applicable to an International Harvester vehicle is the rear suspension and the hood leaves/nose. Regardless of the constant misinformation found on the web...
(and obviously museums as there is no MG pulpit over the commanders station on that half track, which is the only thing that would make it an 'A1')
Everything else in Dragons kits from drive-train and axles, cab interior, body, tires, fenders, blah blah blah ad nauseam is different.
/broken record
...I have laid in mud and snow and gravel, been stung by bees who's nests were hidden inside nooks and crannies, measured, photographed, sketched and compared parts between White/Diamond T/Autocar and IH and they aren't the same!
Good grief.