I have a rotting frame on a 84 bj60 that needs replacment and would like to know what is the average time spent taking the body off and swapping out the frame for a replacment. I have done lots of auto work in the past but this would be a extensive job to do. Also, need to patch up the holes in the body sheet metal so may fab up a mounting jig with wheels and have the body flat bed towed to the body repair shop.