|   Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. | 
| 
			 
			#11  
			
			
			
			
			
		 | |||
| 
 | |||
|   
			
			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 | 
| The Following 11 Users Say Thank You to SuperNovaSS For This Useful Post: | ||
| 
			 
			#12  
			
			
			
			
			
		 | ||||
| 
 | ||||
|   
			
			^ bingo!
		 | 
| 
			 
			#13  
			
			
			
			
			
		 | |||
| 
 | |||
|   
			
			Makes sense.
		 
				__________________ Don't believe everything you read on the internet ... Ben Franklin | 
| 
			 
			#14  
			
			
			
			
			
		 | ||||
| 
 | ||||
|   
			
			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, 
				__________________ Richard 1967 Camaro SS 396/375 4K 2002 Camaro 35 Anniversay Z4C-WU8 | 
| 
			 
			#15  
			
			
			
			
			
		 | |||
| 
 | |||
|   
			
			It could be a 4 bolt based on the truck application  . Jason | 
| 
			 
			#16  
			
			
			
			
			
		 | ||||
| 
 | ||||
|   
			
			Is that what the 4 to the right of the 255 means? I can’t scroll to the top of the page.
		 
				__________________ Richard 1967 Camaro SS 396/375 4K 2002 Camaro 35 Anniversay Z4C-WU8 | 
| 
			 
			#17  
			
			
			
			
			
		 | |||
| 
 | |||
|   Quote: 
 
				__________________ 70Z28 04B Norwood Forest Green-white Stripes Black DeLuxe Interior Owned since 1978 - First Car | 
| 
			 
			#19  
			
			
			
			
			
		 | ||||
| 
 | ||||
|   
			
			Definitely an added Z on the end of an XD stamping. Quote: 
 
				__________________ 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 | 
| The Following User Says Thank You to Jonesy For This Useful Post: | ||
|  1967 4K (05-27-2025) | ||
| 
			 
			#20  
			
			
			
			
			
		 | |||
| 
 | |||
|   
			
			It has an E19 casting and a 0425 assembly should be case closed.
		 | 
|  | 
| 
 | 
 |