I am looking at buying a 05 ram 1500 that the body is very clean on. I was doing some research and found some cases of the frames rusting through from the inside out on some under the rear doors. Just looking to see if anyone has seen this or how common it is. I tried to measure the thickness of the frame on the one that i am looking at in that area and the best i can come up with is it is .120 thick in that area and when specs are looked up it shows it should be .150-.170?