Tire clearance and lift questions

[Pdcjohnson]

So I bought a 2019 ram 1500 with fuel 20x10 -18 offset with 35 12.5 20 Nitto ridge tires it has a lift/ level kit in the front and air bags in the rear. My question is I didn’t notice when I bought it that because the tires are so big and it obviously don’t have enough lift they took out the front section of the wheel liner off and cut the back section out so they wouldn’t rub. How much lift do I need to run these tires and also if I run it like it is can I Put bilstine adjustable shock on it, I believe it has a ready lift 2” leveling kit with tubular upper control arms and spacers on top of the shock. My thought is I could just keep the control arms and put the bilstines in without the spacer.