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10/14/10, 8:50 AM   #3
Re: USAC Historical Question
Seadog
Seadog is offline
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Join Date: Jul 2007
Posts: 2,136
 

Quote:
Originally Posted by #1jackhewittfan View Post
i dont have specifics but i believe they went to 358 in 80 or 81 and 410 3 or 4 years later.
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Thanks for that. Do you know when they started to allow aluminum blocks? Or did they do that when they went to 410?