CRG Discussion Forum

Camaro Research Group Discussion => Decoding/Numbers => Topic started by: 69RALLYSPORTZ28 on February 20, 2020, 01:23:46 AM

Title: 68 Engine Block Missing Casting Date?
Post by: 69RALLYSPORTZ28 on February 20, 2020, 01:23:46 AM

Has anyone ever seen an engine block or heard of an foundry explanation as to why a 68 or early 69 engine block ( 327/302/350) would be missing the the casting date, unless the casting date was intentionally ground away during a rebuild?

Title: Re: 68 Engine Block Missing Casting Date?
Post by: ko-lek-tor on February 20, 2020, 04:14:39 AM

You are looking on the lower rh side of the center of water jacket? Correct? Probably will need a pic to clarify and see what you are seeing.

Title: Re: 68 Engine Block Missing Casting Date?
Post by: 69Z28-RS on February 20, 2020, 04:23:08 AM

IIRC the foundry used 'letters' for 'foundry test' casting (to test new castings).  In some cases, those castings have been used.  I have seen one with an 'M' in the place of the casting date.

You should be able to find a thread addressing this issue which was discussed in the past.