well scott,leave that alone!
putting an a hitch is like the easiest thing if and only if the frame is not bent in any way.
best thing to do is to get one made for your vehicle.they bolt on to origional holes in the frame.if they dont,then get yourself a 1/2" drill,and 3 bits,a 1/4",3/8",and a 19/64ths bits.use the 19/64th for a mark,then drill with a 1/4,then 3/8 then 19/64th.run 1/2"grade 8 bolts,washers,and locking nuts with lockwashers on them.tighten them down tight a you can get it.
get a lite-mate plug adapter which plugs into the origional harness and then plug in the adapter with whatever plug you have on the boat,4 pole,5 pole,whatever style.i went with a 7 pole rv plug on the truck and on my trailer,but i have the adapter to pull a 4 pole adapter.
ive seen some of the u-haul employees,and i wouldnt trust them to bolt the trailer onto my truck!