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Re: backfire from passenger side
Robert. Put the truck in gear, hold the brake firmly. Accelerate rather hard but not WOT. Does it pop rapidly and steadily? If it does, chances are real good you have a cam lobe that has worn flat. Do a compression test. If a cylinders reading is real low thats the one. To verify your findings, remove the valve cover and start the engine and look for a rocker that isn't moving much. If you find one isn't moving you have a cam & lifter job to do sorry to say. jim
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1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shot  Jim or Paladin whichever you choose.
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