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			Does anyone know if the exhaust port height on the ZZ 454 is higher than the steel heads on a stock 69 396 / 325? I am comparing my ZZ heads to some heads that were on the mystery motor that was in my car when i bought it. The block checks out to be a 1977 454 2 bolt, i have not been able to ID the heads. 
		
		
		
		
		
		
		
		
	
	Thanks, David  | 
		
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