Spend some time. Check the entire truck. I bought a $3700 truck. It was a 42,000 mile dealer trade in. Paint was fresh, it drove well, looked very good. The bed soon needed a major overhaul, We replaced door skins, rockers, and cab corners. The tires were good tread, but old. In no time they started showing cracks. 10.00-20 tires are hard to find. New rims, and tires. An engine timing problem drove me nuts. A good mechanic said he hadn't torn it down to confirm, it seemed to him it was the timing chain. By the time they wear out, it's late life for the rest of the engine. I found a 427 truck engine and rebuilt with much of the 366. It was then I learned the timing problem was due to a tiny plastic part in the distributor. A new engine got a new carburetor. My $3700 truck is no longer a $3700 truck.