Through the 1970's, the Paducah shops of the Illinois Central rebuilt worn out EMD GP7 & GP9 locomotives into the GP10.

The InterMountain Railway Company N Scale GP10 Locomotive will be manufactured with finely molded parts that have been designed to reproduce railroad specific details; such as HORST Air Filter, Horizontal Nose Headlight, Extended Right-front Tool Box, & Engine Access Hatches on the roof.