OK, a little befuddled here.
Let's start from the beginning.
What does the ID tag say on the driver's side door jam?
Is the engine in there now a 6 cylinder, or a v8?
Does this truck have an automatic transmission, or is it a manual shifting transmission. (if it is Manual, there will be brake, clutch, gas, and a starter pedal on the floor.
We really can't suggest what to do untill we find out what you have, and what condition it is in.
If you have a 302 6 cylinder, and it does spin, you may just want to get that motor running. Those 6 cylinders are plenty tough, and could probably survive the 12 year hibernation.
