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This question is vague, but if your asking where to get them, anywhere from your local Chevy dealer, to your local parts store, to mail order companies not represented by your parts stores. You may even have a local re grinder in your area, who could be a wealth or knowledge, and help selecting the proper one. If your asking for advice on which to choose, I would say for a smoged vehicle, stay stock replacement. Non smog, for mild performance in a street car, with an automatic, stay with a dual patern. They seem to perform bertter with a torque converter. Stay in the 460, to 480 lift area, 260, to 270 duration, 114 centerline. Keeping the overlap low, will keep efficiency. Mild strip use, go to 500 on the lift, and 275, to 280 duration, and 112, lobe certine, and you will need lower rear gears, and a stall converter to make this work. Anything over .500, you will need roller rockers, forged pistons, steel crank, ect., and is for race applications, only.

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14y ago

What else can I help you with?