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Old 07-21-2004, 02:40 PM
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That 600 may be a little big but will be fine for your car. As long as it is vacuum secondary with the proper spring, jets, pump cam, power valve, it will work great. It will operate as a 300cfm 2-bbl the vast majority of the time. Guys get into real trouble when they put on a 750 double pumper on a small engine and get big stumbles off the line due to way too much carb opened at too low a speed. Bottom end performance is your main concern. If you can punch the throttle and the car responds strongly and smoothly, you are fine. If there is a bog or a feeling of a surge when you hit 1500-2000rpm then the secondary spring is opening too soon or too late. Being a 600, it will have more than enough top end on your engine.
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