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Old 03-20-2010, 01:51 PM
Plaintoast Plaintoast is offline
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Originally Posted by Tubbed357
Yes you are right about the thumper cams. There are better out there. The heads i have are some nice iron centerbolt heads with 64cc chambers. The valves are 1.94-1.5

Do you think it would be a bad idea to run 11:1 on these heads. Im going to get them milled very soon here so my chambers will be in the 58cc area. Also i do have high octane available at the pump right near me.
Any idea what the casting number is on those centerbolt heads?
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