441 castings, 202, 160, screw in studs - no guide plates, built in 2008 for the 2009 season, ran 1/2 season in 2010 and 2011,freshened in the winter of 2011,with Z28 springs and a valve job, ran in 2012,2013, and 11 races in 2014. about 73 nights of racing on the valves. was ran in hobby stock at about 5300 to 5600 rpm max. call me for any other questions. 505-793-0146
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