I need a little help from someone with a new 2020 Ram 4x4 Limited 275/55r20 with air suspension. What is the hight from the ground to top of the cab with the truck lowered all the way down. I'm thinking about getting a camper shell and only have 70". The guy we bought the house from was real short and for some reason don't think he needed a full size opening. He had a truck but must have kept it outside. I would like to use the garage because it is close the house but can keep it in the shop we had built with a real door. We kept my 2500 4x4 in shop because it would not fit without a camper shell.