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					Originally Posted by cletrac  . The 216s had cast iron pistons . | 
	
 Yes, but there was also various brands of aftermarket 216 alloy pistons made , they were even made here . I've got a set of dome top 216 alloy pistons ..from EPAY years ago. They are about 30% lighter than the cast iron type.
Toby, if your bore size is 3.5"  it will be a 216 ..I think Im correct 
Mike