Alot of work to do a fat tire car without a cage. But can be done, a 4-bar set up would be best, ladder bars just dont let you get a car very low. If you want to do it withoout a cage look at the Art Morrison stuff, the have street chassis kits made from 2x4 rails instead of 2x3 rails most race type kits are made of. they have full frames also set for any type of suspension you want to run, including air if you want. They have lots of things for something you are talking about building.

yea, I'm sure. haha