1969 DZ bare block value?

[NorCam]

They are still an early block and most are 010/020 high nickel. To many people, having a CE stamp on the deck is the next best thing when you know the cars motor was lunched. Add the correct 1178 crank, correct rods and pistons along with the dated top end of a Z and you have a legitimate replacement 302 just as the factory would have issued under warranty. That's why they are considered quite valuable.

A very viable option for many, including myself.

[ZLP955]

Originally Posted by NorCam

They are still an early block and most are 010/020 high nickel.

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)."

[cheveslakr]

Originally Posted by ZLP955

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 "0M10/020" 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)."

I've always thought this may be the case since every 010 block and every 020 block I've seen has these numbers on the front. My 396 3969854 has "272" and "512" cast into the front. That's something I'd never seen before.

[earntaz]

I've also heard that both SBC and BBC blocks that were to be used for "marine" applications were a high nickel content ... TAZ