My recently acquired 87 Silverado developed a ticking noise on acceleration that had me a little worried that I had loose rocker, bad lifter etc. I searched the forum and found some references to exhaust leaks causing a ticking sound. Crawled under the truck and sure enough, the exhaust pipe was very loose at the manifold connection. Previous owner put on dual exhaust and the drivers side had worked loose. Anyway, tightened it up and ticking gone. I NEVER would have guessed this tick was exhaust. Now, if i can just figure out whats making the squeak in the drivers side front! Maybe a shock bushing. Thanks again guys!