Cummins L10 330

Question for you guys. I have a 1993 International Dump Truck with a Cummins L10 330. I was told it had 400k on it when l brought. Truck runs good but I would like to put a little more fuel to it. I called the Cummins dealer since it has a ECM on it it was told that it had a mechanical fuel pump on it. From my novice I looking at it I can't see where it's mechanical. Am I missing something and can be the fuel be turned up for just have to be programmed in the ECM.

Thanks for any help.

 

No red, no cable. The accelerator has a sensor under the pedal. As far as the injectors, I would assume they have a wiring harness but not near the truck and never paid any attention.

 

Well back home now and did I little research. The motor tag reads L10 330E. From what I can see the stands for electronic fuel pump. Why is the Cummins dealer telling me they can't turn the fuel up? They just don't want to fool with it i guess.

 

So to get more pulling power out of it is not possible? I dont need anything top end, just would like a little more on the bottom end.
Or just wait for it to run its life out and upgrade.