I did take the cab off, had to needed to replace front of cab floors. I just wire brushed the frame good spent about 6 hours on it then used Eastwoods rust encapuslator. That should take care of the frame for the next 50 years. by then someone may want to put a new hitech frame under it. I'll be 113 by then and most likely the state will have taken my license. Good Luck
