I haven't dealt with much rust personally (thankfully my truck is from TX), but from what I've seen others work with on here, your truck is just a cab and a couple body panels (not to mention the hours of work), away from being pretty desirable. As has been clearly stated so far, this thing is a pretty rare bird. Not too often you find a 3/4 ton stepside with the big block and a/c.
I live right by the Cincinnati-Dayton Rd. and I75 interchange. If you want to stop by sometime and just look at a pile of parts (formerly known as my '68) and maybe get some inspiration for this rig, just send me a PM or an email:
nahasopetalon@yahoo.com