how many zl1 motors were made

**Kurt S** · #1 08-01-2022, 04:24 AM

Quote:

Originally Posted by William

Chevrolet doesn't seem to care much about 53-year-old engineering info.
Today you can visit the GM Heritage Center and request a part drawing. If they can locate it, they will provide a copy.

Agreed. GM does not care about old docs like this - there is no liability or risk here.

GM will not provide copies of prints. If they can find it, you may look at it and take notes.....

**William** · #2 08-01-2022, 06:06 PM

Quote:

Originally Posted by Kurt S

GM will not provide copies of prints. If they can find it, you may look at it and take notes.....

Chevrolet by the numbers books are full of copies.

**Kurt S** · #3 08-01-2022, 06:07 PM

Quote:

Originally Posted by William

Chevrolet by the numbers books are full of copies.

Yup, that was then, this is now.

JoeC · #4 08-01-2022, 07:15 PM

Chevrolet gave the rights to Yenko to purchase ZL-1 blocks from the Winters Foundry in Canton Ohio. (with some restrictions).

The part number listed is 3952318

The letter is dated June 7 , 1974

signed by F. A. Duco , Director, Manufacturing Sales

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