So, it appears that there is already a frame mounted cross "tube" on the trucks that come with no receiver hitch installed? Seems strange but mfgs do strange things.
Personally, even though the little bolt class IV is rated 1000/10000, I'd spend the $150 vs $60 and just get a real frame mounted class V receiver.
If for no other reason than the small one ties into the bumper and the cross tube and I wouldn't want a hitch tied to the truck bumper.
For me, this is not a good place to save $100.
What's strange, is Hemi with 3.92s and no OE trailer hitch. Mfgs sure do weird things sometimes.