im going on a little road trip at the end of the month so i was going to put on different tires because my low profiles are kind of balding. I have two of theorg tires that are good enough to use and i have two more tires from a 93 fleetwood that are a little smaller than the two org tires. The two org are 275 75 r15 and the two off the 93 fleetwood are 270 70 r15 i was going to put the bigger ones one the back and the smaller ones on the front. Im trying to think what i did with the lugs nuts. Can i just use the aftermarket lugs from my rims or am i better going to napa or something and getting new ones? also i dont emagine the tire size difference from the rear and the front will make a difference will it? The tires have also been sitting otuside for about 8 months, still have air in them but is there anything i should look for?