Technical Quick BBC Question

Should cover the suffix codes
https://wowmusclecars.com/chevrolet-big-block-casting-no/

 

WOW! So much info here. Thanks for all the replies.

 

Gen V did away with the boss and went to non adjustable valve train(moot point with the Edelbrock heads), Gen VI had the the fuel pump boss re-introduced.

 

Worth knowing is Mark IV and Gen 5 oil pans do not interchange, probably due to the one piece rear seal on the newer blocks. Also it is possible to install a Mk IV crank in the later block with a seal adapter. Gen 5 has improved oiling and the blocks are tapped for oil cooler lines.

 

I gave up on modern stuff in that era, save for the dreaded LS.

Has to be a Gen VI block then. It should have a roller cam. In his case it might be worth seeing what cam it actually is, since someone has been doing some work on this thing.

 

I think the timing cover tells us it's the later block, too.

 

Early Gen VI didn't have the provision either, it was like mid year or something

 

That's the second one I've had, Tonawanda foundry guys screwing around, here's the other