The Supercar Registry - Identifying a DZ302

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- - Identifying a DZ302 (https://www.yenko.net/forum/showthread.php?t=145819)

Quote:

Originally Posted by marshall (Post 1377988)

IMO , i don't think its a myth about the harder material content . It clearly states that the new design 1969 engine block has a new stronger construction , tougher cylinder block and extra firm bearing caps in this 1969 gm Camaro brochure. Either way you can draw your own conclusion. Thanks Marc.

I posted this reply in a recent thread here:

Quote:

The 'high tin/ high nickel' story is actually just a myth, John Hinckley posted about this over at CRG:
"And, as it turned out after further research with the Saginaw Foundry (now called Saginaw Metal Casting Operations, part of the GM Powertrain Division), the old story many of us were led to believe about the 010/020 describing the tin/nickel alloy turns out NOT to have been true at all, although the magazines thought it was true and continued to publish the tale, and still do today.
Actually, the "010/020" cast into the front bulkhead under the timing cover turned out to be simply the identifier for the foundry pattern for the front bulkhead, which was shared by the 3970010 (350) and 3970020 (307) blocks; it had nothing to do with the iron alloy, which was never altered for any particular production block (although the alloy was altered for some later low-volume GM Performance Parts over-the-counter "Bowtie" blocks)."

So what I'm reading here is that there's no real way to definitively tell if it's a real DZ without the pad stamping? That bites.

I went back and looked at it again, and it's probably just my eyes, but it does look like there are some vague stampings coming up. I'm going to double check it with the wife's eyes again tonight since she's got better eyes.

Appreciate the help.

Did you look for the VIN on the side of the block? If your car is a Z28 and the VIN on the block matches your car then it is a DZ block. Easy

The engine isn't original to my car. I will jack up the car this weekend and check on that VIN. With any luck, maybe I can link the engine up with the original car, as I'd absolutely love to do that.

I believe the car that the engine came out of is the 68 Camaro in his signature so it couldn’t be the original to the car.

Jason