Well, I checked this BIG Chevy out today...well...
Here is what it really is - a 1977 C-60 with tandem axles! I saw that and figured there is no way I could use that monster. Needed rubber all around, truck was really "used" in more ways than I can imagine, and the tag had been expired for three years. It did run, though. That's what I get for hearing about a truck through a third party that really didn't know what it was to start with.
Oh, well. It was not very far away, so it wasn't a big deal to go check it out. Thanks for the advise, guys!