L78 396/375 HP Long Block CKO Stamping - Page 5

**SuperNovaSS** · #41 05-01-2006, 07:50 PM

Thanks Mark! I felt like a lobster over here. I noticed that pad had the same 2GMEXXX stamping. Any idea what it could mean?

**PeteLeathersac** · #42 05-01-2006, 08:08 PM

And notice the 2 & GME & XXX are all on different angle/planes so have been done w/ 3 different hits....possibly at different stages of assy? .

~ Pete

92646 · #43 05-02-2006, 01:50 AM

All I really knew about the motor is where it sat for almost 20 years. I thought it would make a real neat warranty replacement motor for a 1969 or 1970 car but it never got used. I sold it for my buddy about 3 years ago then last year I end up with a LA built SS396 Camaro that I think is a L/78 but with the wrong motor in the car. If Jason's motor came out of a boat and this one looks as if it was in a boat before it was put storage. Is it possible that these were installed when the boats were being manufactured? If I remember right Mercury marine used a LS6 crate motor later on in boats. And that might help explain the additional stampings on the pad. The motor I had did not look to have been apart and still had the factory GM / TRW pistons plus the hone marks in the cylinders.
Mark Sheppard

Rick H · #44 05-02-2006, 02:07 AM

[ QUOTE ]
Shoe leather tastes good

[/ QUOTE ]

I'm not eating anything, Marlin. Go back and read where I ask if this was a marine engine. I vaguely remembered seeing that stamping someplace and when mark posted his picture and I noticed the front of the engine it became clearer.

Both these engines, Jason's and Marks were built for marine use.

Rick H.

**SuperNovaSS** · #45 05-02-2006, 04:10 AM

Rick,

What about the fact that you insisted that my pad had been restamped?

Jason

Rick H · #46 05-02-2006, 05:22 AM

Jason,

I never insisted anything.

I haven't seen you even once consider this engine a marine engine.

Good luck with your sale.

Rick H.

**SuperNovaSS** · #47 05-02-2006, 05:38 AM

Never considered it a marine engine? Here is a quote from my original posting, "This engine spent most, if not all, of its life in a fresh water jet boat." Also, here is another from the 3rd page, "I may have also been a marine engine from day one, but the stamp on the pad was NOT added." The "I" in that quote should have been It. I am very interested in learning the true history of this engine. I like to think of myself as an open minded person, maybe I have been fooling myself. Where ever this engine was originally installed I am fairly certain it left the plant with the heads that on with it now.

Jason

**Xplantdad** · #48 05-02-2006, 06:37 AM

Could the ME stand for Marine Engine?

Just wondering...

CamarosRus · #49 05-02-2006, 10:31 AM

If and when this thread comes to a conclusion, WE still need to learn why this 290 block casting, 1971 assembled engine, has the 1970 CKO code (?????)

Thanks,

**SuperNovaSS** · #50 07-24-2006, 03:42 AM

I have placed the short block and heads on EBay at NO RESERVE. Check them out!

Block

Rectangular Port Heads