454 Block ID

[John81287]

After pulling my 454 out of my C30 today I located the casting numbers on the block. gm 10114182 are the numbers. Everything I see says its a gen 5 motor. Any input to confirm or deny this would be great! Thanks. Although if it is a gen v I have alot more options for my serpentine setup.

 

[SlickGTP]

If you take everything off the back of the block it should have a one piece rear main seal for the Gen V and VI blocks... The Mark IV had a two piece rear main seal.

 

[nvrenuf]

2 pc rear main seal + mechanical fuel pump boss = Mark IV
1 pc rear main seal + w/o mechanical fuel pump boss = Gen V
1 pc rear main seal + mechanical fuel pump boss = Gen VI

 

[John81287]

No mechanical fuel pump! That's for sure the guy that helped me pull it said it dot even have the mounting location for it. I've got electric fuel pump on it with a carb. I've got it hanging on a stand in the garage so I can't really see the rear seal.

 

[nvrenuf]

If there's no mechanical fuel pump boss then there's no doubt it's a Gen V block.

 

[John81287]

Odd cuz it came out of my 85 C30! Good information to know though. I should be able to pull a serpentine setup off a 92 - 96 block then and it should bolt right up.

 

[John81287]

Dammit I have the wrong flywheel!

 

[junkyardog05]

Do you have the numbers off of the front of the block? Yhey are located just below the alternator on a tab that sticks out past the head. All I would need is the last 2 or 3 digits from that tab.