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Old 01-28-2006, 03:49 PM
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pontorquer pontorquer is offline
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Go with the 6X's ! They have hardened valve seats and screw-in studs and are excellent heads ! Valves sizes are 2:11 intake and 1:66 exhaust...inches.
Pontorquer=PONTIAC=TORQUE MONSTERS !!!

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Old 01-28-2006, 08:05 PM
74Grandville 74Grandville is offline
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I would not go with either if this is for a 350. 6X-8 heads will give you really low compression i'm guessing 7.6:1. Find some heads with a chamber of 72-80cc's

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