Another tire size question for the knowledge ones
 

Within the next month i'll be buying rims from a buddy dirt cheap. And got some good deals on some tires. But not 100% sure after reading so many forms that turns into people arguing what to do. Currently have a stock 2011 F-150 3.7 v6 XLT looking for information on what is needed to run 33x12.50x18 or 35X12.50X18. Some people say 2.5" level on the front, 2.5" on the front 1" on the rear, then theres the people that say you need a lift kit or body lift. So many options. Just don't have the extra cash right now but needed new tires last fall. Thanks a head for any input!