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			#11  
			
			
			
			
			
		 
		
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			My bet is it was an XD suffix engine that someone added a Z to the end of and made up to be a “DZ” engine. The XD suffix is a 69 truck 350/255hp engine from a truck as shown in the attached screenshot. 
		
		
		
			Jason  | 
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			#12  
			
			
			
			
			
		 
		
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			^ bingo!
		 
		
		
		
		
		
		
		
		
	
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			#13  
			
			
			
			
			
		 
		
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			Makes sense.
		 
		
		
		
		
		
		
			
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	Don't believe everything you read on the internet ... Ben Franklin  | 
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			#14  
			
			
			
			
			
		 
		
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			I couldn’t find the XD code in any of my car books, that’s because it’s a truck motor. I had thought that’s what someone had done but couldn’t find XD info. 
		
		
		
		
		
		
			It’s probably a two bolt main block also. This proves people were trying to fake the DZ engines 25 to 30 years ago at least. Thanks a lot, 
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	Richard 1967 Camaro SS 396/375 4K 2002 Camaro 35 Anniversay Z4C-WU8  | 
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			#15  
			
			
			
			
			
		 
		
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			It could be a 4 bolt based on the truck application  
		
		
		
		
		
		
		
		
	
	. Jason  | 
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			#16  
			
			
			
			
			
		 
		
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			Is that what the 4 to the right of the 255 means? I can’t scroll to the top of the page.
		 
		
		
		
		
		
		
			
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	Richard 1967 Camaro SS 396/375 4K 2002 Camaro 35 Anniversay Z4C-WU8  | 
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			#17  
			
			
			
			
			
		 
		
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	70Z28 04B Norwood Forest Green-white Stripes Black DeLuxe Interior Owned since 1978 - First Car  | 
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			#19  
			
			
			
			
			
		 
		
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			Definitely an added Z on the end of an XD stamping. 
		
		
		
		
		
		
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	1969 Camaro RS/SS Azure Turquoise 1969 Camaro Z/28 Azure Turquoise 1984 Camaro z/28 L69 HO 5 speed 1984 Camaro z/28 zz4 conversion 1987 Monte Carlo SS original owner  | 
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 1967 4K (05-27-2025)  | ||
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			#20  
			
			
			
			
			
		 
		
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			It has an E19 casting and a 0425 assembly should be case closed.
		 
		
		
		
		
		
		
		
		
	
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