Fuel smell in the oil is a good sign that the oil hasn't been changed in a while. Carburetor might also have some normal problems causing it to run rich. Below is a page that I'm sure will prove quite valuable in the future.
B2200 Info
If you replace the nessesary gaskets as needed and give it a full tune-up when you get it, it will be a good little truck. Just make sure after the head has been re-installed that you run the truck one heat cycle or drive it about 50 miles and cool and then torque the head bolts again at factory spec (60 lb/ft I think). The head is known to settle a little bit due to it being aluminum, retorqing will help garantee that the head bolts won't be loose and cause the same problem again later.