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Has USAC changed the rule for the Silver Crown cars to allow aluminum blocks? I have been following one of the Facebook pages and one team has purchased and is building an aluminum engine. I checked the rule book this morning and Rule 219 C 1 states that no aluminum blocks are allowed.
I did not see any announcements from USAC at PRI regarding a block rule change. Have all of the 2014 registered teams been notified?
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