Inspired by an image I'd seen on the QuickJack website, I mounted the frames to my garage wall.
I mounted the frames using 2 x 3 3/4" and 2 x 5" 3/8" wedge anchors. These are designed to bolt something to a wall, but can be used to just mount a stud to the wall, which is what I did.
I mounted the studs about 1.5 inches into the wall, leaving 3.5 inches sticking out for the longer bolt, and 2.25 inches sticking out for the shorter one. I also used two slim 3/8" nuts and a washer on the end of each stud to stop the frames from potentially sliding off, and wrapped insulating tape around the threads to make a smooth surface for the frames to hang from.
I'm pretty happy with the results:
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2018 ///M2 LCI, LBB, 6MT...
Current Performance Mods:
CSF FMIC, ER CP, Fabspeed Cat, Aquamist WMI, GFB DV+, NGK 97506, BM3 (Stage 2 93 OTS), CDV delete, UCP, M2C/M3/M4 Strut Brace, M3/M4 Reinforcement Rings