Thanks so much to April, who is daughter of the great Floyd and Virginian McKechnie, back in the day they ran the 743rd reunion group. 743rd Railway Operating Company C taken in April 1944 at Camp Robinson, Arkansas. Here is the rolled photo in 4 sections and the name key as well as Virginia Ms notes on missing names.
743rd Railway Operating Company C taken in April 1944 at Camp Robinson, Arkansas. by Nancy on Scribd
743rd co photo Names Combined by Nancy on Scribd
*I can send a higher quality of a panel photo if you find your GI.