Agree, a 750 or 770 (Holley's new carbs are 770's) would be good unless it's a very high reving 468 and used for mostly racing. Check the Holley and Edlebrock websites. They'll tell you what size carb based on the basics of the engine and how it's used, street, street/strip or strip only.
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Hank
70 Chevelle SS396(454), M20, 3.73
My Chevelle
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