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Of Burning Interest… I’ve got a ’66 model with a 289 V-8 engine, automatic transmission, air and power. I bought the car new and I’ve given it kid glove care for nearly 30.000 miles. I change the oil and filter every 3,000 miles. Most of my driving is slow short trips, but I try to do some highway driving every weekend. My #5 cylinder reads 40 lbs. of compression, #1 reads 115, and all the rest read 155 to 160 lbs. Could it be that I’m using too cold a plug for this engine, causing burned valves? What could happen if these valves aren’t replaced? The engine runs fine, the vacuum reads normal and steady, and the only thing I’ve noticed is a slightly rough idle that can’t be tuned…

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Hot Rod (Digital) - 1 Issue, October 1969

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