This may sound stupid but I'm trying to figure out if my rig will fit in the garage after I lift it. At present I have no lift and 31" tires. I was thinking a 6" T.C. spring lift w/ 35" tires. So if the new tires are 4" taller (2" more radius) and the advertised lift is 6", am I looking at a 8 inch higher roofline? I'm just trying to see if my logic is correct on this. I like to be able to work on my rig inside during the winter. Thanks.