18 inch wheels

what needs to be done to tuck 18 inch wheels. I dont have bags or anything yet but I will within the next year or so. when i put wheels on there i want either 18x7 or 18x8, not sure yet. anyway though i already know the wheels i need need to be alteast 6X5.5PDC 6.1B/S or atleast thas what tha guy at boyd said. i was just wontdering if anything else needs to be done

You can lay frame on 18's w/ a 35 series tire.. if you want to go any bigger you will need to either flip your ball joints or get drop spindals. You will defenatly have to cut your inner fenders out when you bag it out.. because those suckers will come into the engine bay.