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					Originally Posted by  bigblockv6
					 
				 
				I've never had a detonation problem with the HEI. Also I always wanted to find spark plugs for my 478 that's in my 68 now that would have the .060 gap so I found AC 44XLS6 were compatible. 
			
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      A 750 cfm carb would be too much carburetion for a 305 V6

, 650 cfm would be the maximum