what are you guys with the 20's running for pressure? i have an -03 with stock 17's that calls for 35 max, which is where i run them. i have 20's from the f150 arriving today with the scorpion atr's. i know they hold 44 psi max, but not thinking i want my teeth to fall out!! i was guessing around 38-40. i dont have a new expy o the lot here to look at the door sticker. thanks in advance.