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#1
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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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#2
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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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