franchise: I see you mentioned 54" for one car, I'm guessing that's your 70 Chevelle. My bad for not catching that earlier. At 108" ceiling and one car being 54", that's not much left to fit the second car, maybe a lowered GTS/SRT coupe? The other thing I was thinking of, was, if you plan to get a convertible, you can store that car on the bottom with the top down, back the car in but stop before the windshield, given that you have the length of your garage to cover the front end of the car. Measure your ceiling height again, and again!...from entrance to other end, you sure it's 108"? I'm hoping that you got a little more...
I must have took measurements about a hundred times before I got my lift, just to be absolutely sure.