Though I haven't found any specific information about Lend-Lease deliveries of this vehicle, their evidence simply arises from the fact that the post-war Russian ZIS(ZIL)-151 truck front was an almost exact copy of the International K7.
As Bart Vanderveen remarks, the K7 was built in various wheelbase sizes, the one shown being the short wheelbase version.
The International Harvester Co. provided another 2½-ton truck for Lend-Lease, the well-known M-5-6x6, which, this time proved by war-time photos, also served as a "Katiusha" carrier.