[nvrdone]

Hey Robin - from the pictures it looks like the running board isn't fastened to the fear fender. If you fasten them together does that move the filler panel up and close the gap ? Do you have an after market frame or the stock one ? Are the running board brackets mounted correctly? Could you shim between the running board bracket and the bottom of the running board to close that gap ?
Maybe someone should hop a flight and come over and help you out. Anyone willing ?