With the Distribution box and assorted cables? Like a AN/MJQ-41B? Or are both mounted on one trailer? Reason being, the D-box and paralleling relay in it can cause problems. And often, when it is two sets, (as PU's instead of PP's) and only a paralleling cable and a buss bar, the connections, if not tight, can generate heat and give the gen sets the indication of a overload.
400 hertz. What kind of load? Plain Restive, like a load bank? Or an active load, equipment that has sup loads that can turn on and off at will?
Since you are in Utah, are you at Tooele? Or active duty? Thats all I worked on for 20 years, 400 hertz, Hawk and Patriot.