P.S. MAKE SURE you find out if there is a catalytic converter on your exhaust. I know when the converter on my '77 Chevelle started to plug at about 125,000 miles the engine acted like it was very tired and the gas mileage dropped sharply. I invested in a new converter, which is still on the car and now at just about 190,000 miles, and she went back to her old self immediately. The converter, if you have one, will be in your exhaust between the engine and the muffler.
Ken B
