Auto Parts: fuel pressure, steep grades, fuel pressure

Question
I have a 99 Winnebago Adventurer (30 feet, class A).  It seats on a 98 Chevy chassis w/ the a 454 cu.in. (or 7500 Vertex???).  Question the fuel pressure at the check port on the engine is at the lowest end of the pressure spec.  Will this effect me pulling heavy loads up steep grades?

Answer
    It could, in fact that would be about the only time it might affect you.  What you have to do is find out whether the pressure is low because of the regulator or the pump.  Sometimes these long motor homes have long fuel lines and require a booster pump to get full pressure up to the engine.  Any motorhome or large truck repair facility could supply and install a pump like this.