Engine Code Suffix markings on Block

[Brian Monticello]

As I was cleaning up my block I found these markings - it wasn't until I flipped the engine over that it made sense. The stamp pad shows HC and the markings on the side of the block must have been an assembly line marking.

This isn't a Corvette block but it is used in a Corvette. I thought i'd share these pictures for anyone that was interested.

stamp pad picture showing HC:

[Joe L.]

Re: Engine Code Suffix markings on Block

Brian------

The yellow crayon-applied engine suffix code in the location that you have found is very common on original Flint-built small block engines.

Depending upon date code and other factors, this engine is a 250 or 275 hp 327 from the 65-68 period or a 250 hp 350 from 1969.

[roland verrico]

Re: Engine Code Suffix markings on Block

I read your post and remembered being told that the HC code in 65 being for a full size passenger car.Let me know what you find out. Thanks.

[Joe L.]

Re: Engine Code Suffix markings on Block

Roland-----

The "HC" engine suffix coe was used for full size passenger cars with 250/275 HP engines from 1965 through 1967. It was not used only for 1965.

[roland verrico]

Re: Engine Code Suffix markings on Block

Thanks for the reply, now just so I understand correctly the HC was not used in corvettes only passenger cars.

[Joe L.]

Re: Engine Code Suffix markings on Block

Roland-----

The "HC" suffix code was not used for Corvettes.

[roland verrico]

Re: Engine Code Suffix markings on Block

Thanks Joe, that is what I had been told in the past but wanted to be sure I heard right.