MFL wrote:
^ Good point Gary! That is where bed length can make a difference. My Ford standard bed is 6' 9"s.
With OP's arms in full rear position, and like you 6' 4" bed length, an adjustment may be needed, for hitch to fully slide. Again, pin box design, bed rail clearance, can differ. Pin box support can be trimmed, or in your case, a FW gate works for you.
Jerry
Thinking about this a bit further, my fiver has an extended Morryde pin box, so yes clearance to the tailgate may be an issue. Then again, maybe with the arms in the rear position, the slider won't be required. I'll need to check this out carefully when I get the fiver home.