MSD systems tend to screw up most timing lights you need to try the cheap ones, it seams silly but the cheep ones work better. the best ones are battery operated it helps reduce the interferance most of the real fast cars use the one from flaming river there about 45.00 no cords to connect either just hook it to a plug wire. the light itself runs on d batteries which is nice if your battery is in the trunk. also has a 2nd button on it to operate like a flash light which is handy to point it at the ballancer and find your timing marks before you start the car. well worth the investment!
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8.90 @157 mph 3424 LBS. 77 Trans Am All Steel, on 10" tires
