[dmjlambert]

They are both salvageable if they are together and have the doors and tailgate attached. Don't worry about rust. Just fix the engine, transmission, brakes, and drive. If you don't love them a lot driving them like that, someone else will give you enough money for the one you like the least to finance doing more work on the one you keep and really make it nice. Both of them will be worth a lot more if they are running. For me it would be hard to choose between 67 Chevrolet and 71 GMC and it would be hard to let go of one of them. That's my advice. The amount of rust would have to be truly shocking to make them worse than my rusty and cool daily driver 69 Chevrolet half ton.