All six LS750s were sold to a single railroad, with two being sold after the LS-800 had been introduced. The 23 LS-800s were sold to just two railroads.
Lima-Hamilton did not assign model numbers to their models but referred to them by specification numbers. Model designations such as LS-750 or LS-800 were a railfan invention. Lima-Hamilton assigned A-3149 as the specification number for the 750 hp model, and A-3171 as the specification number for the 800 hp model.