I bought a 1998 24v cummins in a 37' coachmen. It is not the 53 block as far as I can tell. Are there issues with the fuel pumps like there was when they were in our pickups? It has the 6 speed allison behind it. Anyone turn up the power a little bit? What is safe to run. Not planning on running over 65, but I do plan on towing a 7k trailer with it. This is a class A camper.