I have been using a pickup truck to haul plastic boats for about 26 years. A Coleman crawdad in a Nissan King cab (11' boat with a 6' bed + tail gate). I did that for about 15 years. Eventually I got a toyota tundra double cab with a 6.5' bed. In that truck, almost the entire flat part of the bottom was supported. (I still have that boat and use it some times). None of that seems to have hurt that hull in the least.
I got an Outback in 2011 and newer one in 2019. I tote both of those in the bed of the Tundra and I have not seen any ill effects from doing so. That said those kayaks are 1 to .5' shorter than a Revo and my bed+tailgate length is probably 1' longer which helps me.
As for legality, I know in Oregon the law is that max overhang past the rear axis is 3/4 the wheelbase. For my Toyota tundra (2004 with 6.5' bed) that ends up being 13' from the front of the bed. If you angle the kayak you could probably have something that is 13.5'. Every state is going to be different though so I would check your local laws.
A bed extender (as suggested above) is certainly only going to help. I had thought about getting one but I just did not like the idea of that thing sticking out while I was parked when fishing.
Best of luck!
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Fish tremble when they hear my name

A ship in harbor is safe -- but that is not what ships are built for.
--John A. Shedd, Salt from My Attic, 1928