I'm looking for an older pickup to use as tow rig/occasional driver. I was looking at some 1970's F250's, but then figured maybe i'd check out a Jeep. Don't know much at all about Jeep trucks. Any clues as to which years/models would be best to look at. I couldn't tell ya a J10 from a J20 from a Doobie Woobie. Thanks.