building a shop, want a lift. sidewall height will be 12' clear. my vehicles are: 03 ext cab shortbed 6.0 diesel f250, 99 ranger, 82 bronco on 40s. gf has small suvs. on to the lift will be a 2 post for sure. but that is where i get lost, symmetrical, asymmetrical, bar on top, drive over, 9 or...