Have you ever measured the garage? I think a lot of them say 80" but may actually be more.
Mine is almost exactly 80" - so no extra cushion built into the sign. If I have my awning on - it sits about 4" higher than the OEM rails - I will hit in my garage at work. I know. I've done it. Didn't damage anything. But it hits the sprinkler pipes so if I navigate carefully I get get into a couple spots and back out without going under any of the pipes. Fortunately I also have the option of parking outside if I need to leave the awning on. I definitely think very carefully about what mods I want due to this parking issue. I had GX460 air suspension in my 5th gen for a while. At some point I'd like to go back to them so I can have that adjustable height again. I'd like to re-visit the system again, but I could never sort out a viable solution for the front that is adjustable height on the fly, nor could I get a nice feeling rear shock setup to go with the air springs. I've been waiting for the Bilstein 8100 rears to come out if they ever do like the zonecontrol setup for the Tacoma. I think they'd be just the answer with the valving adjustment options to get something dialed in that works well.
At home I've always regretted not building my personal garage with 10' ceilings and 8 or 9 foot doors. It was a compromise of second floor shop space overhead vs height below due to some height/setback restrictions. My Land Cruiser has no chance at all of fitting with 7' door, but I store it at my parents' anyway - they have 14' tall doors in their shop, so it fits... lol.
That's a good point, I should definitely measure as it could be higher than listed. I know we have a parking garage in the shopping center across the street from our office and it claims 6'10" but there is no way it is that high. My wife and I just built a new house last year and our neighborhood requires 8' tall garage doors so that was a nice perk as I wanted that and we were able to get 12.5' ceilings in the garage. I badly want to get a front runner 3/4 rack but I think it would cause a lot more issues with parking than the minimal use I'd get from the rack. Although, I just saw the victory full rack and it claims to sit 2.5-3" at the highest point and that's really close to just the height of the shark fin.