ZL1 engine

[yountto]

The ebay fees pale in comparison to the taxes that need to be paid on the profit....

[SuperNovaSS]

I've decided the price will be $17,500 providing the heads come back with a OK. Included will be the block, heads, crank, intake(163), oil pan, timing cover, and push rods.

Jason

[GMH454]

Does the block have its studs, do the heads have the original rocker arms.
AND....did you find any markings in the block ?????

Is there any sign that the stamp pad was ever stamped ???
There are a variety of unique stampings on these engines and it might not be the familar style ???

[SuperNovaSS]

The mains were studed. There were head studs but they came in a box, not in the block. I will know better on the stamping when I pick up the block, but rpoz11 said he checked it over well and saw nothing. It did have a series of numbers opposit the casting number but I did not know what they meant.


Jason

[rpoz11]

Basically, this block appears to be a latter issue of the original from the original molds. I'd bet most that this was a early 70's re-issue based upon demand. As Ive heard, and Im NO authority on it, the original run was made, stopped after enough warranty blocks were poured, and then re-poured again later for a small final run. I did not see any VIN stampings on it whatsoever. With the smaller 2 in the 3946052 casting number, I will bet my Camaro on it that this was a 70-73 re-issue. The heads I think were 73 or 74 dated and the 163 was obviously not correct for it; I would like to allow the new current owner to finish off here on this since it is now in his hands.

[RichSchmidt]

I am not an expert on ZL1 dates and codes,but didnt later ZL1 blocks come without sleeves and use iron plated piston skirts?I believe after 1972.I dont know if the exact date or application for unsleeved blocks{I think the Can Am motors were unsleeved}but I know they existed.

[GMH454]

Good point. What is being discussed on this thread is the original casting for ZL-1s used in Vettes Camaros, and some racing teams, Penske, McLaren, etc.
After the first batch was done, some were put in cars, many set aside for warranty, others held back for over the counter, and others used for the chosen racing teams. I think Greenwood stated that he picked up the last 16 in around 74-75. After the first run the same casting was used to produce more blocks but beleive these were not dated as they were never intended for instalation in cars. Later Yenko used same cating to produce a series of Yenko blocks, and these have the snowflake altered in various ways.

What you are refering to is a Reynolds Block, designed for Can Am, although Grumpy used one in his 1970 Camaro. These should not be confused with ZL-1s.

[Eddie M.]

was the Can-Am block not machined for a fuel pump?