Re: L72 engine
We have a 455 powered '72 Lemans. The Q'jet is from a '70 Ram Air III engine. The car is quicker than our L78 and satin smooth to drive. I've had lots of Holleys that worked fine. The 4346 on the Chevelle for one. I've had Q'jets the same. I've also have one of each on the shelf that absolutely won't work. Seems like they both have some kind of internal problems. Perhaps casting flaws? None of my usual cures have worked. A well set up carb can make the difference between a car you love and one that you hate. Jim Hand, the Pontiac guru, sure knows how to make them work.
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Chevelleless after 46 years......but we did find a low mileage, six speed, silver 2005 Corvette. It will just have to do for now. 
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