I recall a post somewhere describing a similar issue. Their solution was to install a plate “sandwich” in the passthrough to provide a mounting surface. The strongarms are not bearing any weight so the mount provided all the rigidity they needed.
On mine, (bumper pull) there is no crossmember where I wanted to mount the front inside strongarms because my water tank is there, so I bolted a 6’ length of 2” angle bar between the frame rails and attached the strongarm mount to the middle of that. If I recall, they suggest a maximum distance of deviation from square to allow for these variables
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Rob & Amy
2019 Passport 240BH SL (current)
2024 Cougar 29BHL (on order, due early May)
2022 Ford F250 7.3L Godzilla Crew Cab FX4
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