[JMR5]

This is just my opinion, but I would start with the running gear to get the truck on the road long before worrying about the body. That way you'll get to know your truck mechanically and have some time to drive and enjoy it before you tear it down. I also think that getting a taste of driving your classic rig will make you appreciate it more and will give you more incentive to get it back together after you tear it appart.