I have a shortbed truck with a liftgate. Hope this helps..
I put a pair of initial d's on it.
I have had 2 crusin usa's, a 25" cab and both seats on it.
I have had 2 hyrdo thunders, a gauntlet legends and both seats on it..
I had 2 crusins, 3 25" cabs and 1 seat on it... But that was with both crusins riding on the liftgate... Not a good idea..
if your moving hydros, they are very front heavy without the seat on, so be careful. I would think you could fit both with the seat on, but strapping them down might be difficult. Better to pull the seat on 1 so you can turn it sideways.