Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. | 
	
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			No difference as long as it’s a 70-71 engine. In 1969 and before they used different breathers that slid on a metal stalk instead of pushed into a big grommet in the pass side valve cover
		 
		
		
		
		
		
		
		
		
	
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| The Following User Says Thank You to njsteve For This Useful Post: | ||
 sixt9rsx33 (10-11-2021)  | ||
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