Re: ZL-1 Block Marking Help
 

OK, that makes sense about the markings helping to ID the block. I was not too worried about the snowflake either but it is a bummer that is is gone. It probably took a few minutes to remove(for the same reason as yours) and will take many hours to replace.


Thanks again,

Jason

Here are a few pictures of other parts that were on the short block if anyone cares:

Factory deep sump pan converted to dry sump:

http://i179.photobucket.com/albums/w...psfc7f9e48.jpg

http://i179.photobucket.com/albums/w...ps2f7092da.jpg

Summers Bros timing cover and GM aluminum waterpump with reduced inlet:

http://i179.photobucket.com/albums/w...ps282e1e5b.jpg

Chrome balancer of some sort:

http://i179.photobucket.com/albums/w...ps8ae7ec9c.jpg

http://i179.photobucket.com/albums/w...ps8f5d87a4.jpg


Electric water pump drive motor and dry sump oil pump:

http://i179.photobucket.com/albums/w...psdbe2be2e.jpg

Re: ZL-1 Block Marking Help
 

Heavy weighted crank:

http://i179.photobucket.com/albums/w...psc1102782.jpg

http://i179.photobucket.com/albums/w...ps0bbb224d.jpg


Pistons and Rods:

http://i179.photobucket.com/albums/w...ps7a5d823d.jpg

http://i179.photobucket.com/albums/w...ps2ef8fd35.jpg

http://i179.photobucket.com/albums/w...pse7810c79.jpg

Re: ZL-1 Block Marking Help
 

Jason, that is a bummer about the snowflake..that is what everyone always wants to see.

I hate to say anything is typical, but here goes. The cast letters on the rear flange and the stamped YS on the front are typical of Yenko blocks I have owned in the past.

I have owned yenko blocks with screw-in freeze plugs, and with push-in freeze plugs. Ive owned and them with a snowflake (with the L), with a YENKO letters cast in it, and also with the YENKO crest cast in it. So I hate to say 'typical' when it comes to these blocks !!

I have seen legit GM blocks with no date codes in them like this also....Just to check, are they aftermarket main caps? hard to tell by the pics. Any stamped numbers in them?

whats with the oil filter? never saw one like that? thats for the dry sump?


max

Re: ZL-1 Block Marking Help
 

Max,

The main caps are aluminum and I assume they are aftermarket. They are simply stamped 1,2,3 and 4 to mark their positions. The other ZL1 block I have has cast "964" caps like cast iron blocks have.

The oil filter is a System 1 unit with a removable mesh filter element. These are still available but I'm not sure if the design is the same as this older model.

I was told this block was purchased from a Chevy dealer 69 but the original purchaser has passed away so there is no way to verify.


Thanks,

Jason

Re: ZL-1 Block Marking Help
 

Max,

The main caps are aluminum and I assume they are aftermarket. They are simply stamped 1,2,3 and 4 to mark their positions. The other ZL1 block I have has cast "964" caps like cast iron blocks have.

The oil filter is a System 1 unit with a removable mesh filter element. These are still available but I'm not sure if the design is the same as this older model.

I was told this block was purchased from a Chevy dealer 69 but the original purchaser has passed away so there is no way to verify.


Thanks,

Jason

Re: ZL-1 Block Marking Help
 

Here is a link to the System one filter:

System One filter

It looks like they are now plastic rather than aluminum.

Jason

Re: ZL-1 Block Marking Help
 

Cool block!

Re: ZL-1 Block Marking Help
 

Thanks Matt.

Here is a picture of the cam end. I have a inquiry to Isky to see what the specs are.


http://i179.photobucket.com/albums/w...pscb505066.jpg


Jason

Jumbo's Racing Engines Block
 

I know this is an old thread but I just found it and wanted to add some information.

Back in the very late 1970's and early 1980's my stepfather raced at Terminal Island/Brotherhood, Orange County International Raceway OCIR and at Pomona. He met and teamed up with Vince "Jumbo" Zamora. Jumbo drove a Red El Camino. I believe it was a 1970. I seem to remember it having a custom weight shifting mechanism in the bed.

I don't know the details but apparently some shady business dealings occurred and Jumbo cheated or stole from my stepfather. Not sure if it was in the form of money or engines or parts.

I now own the car my stepfather raced. It was an all steel full body 1929 model A Ford called "My Mistress". I'm attaching a photo of it in case anyone has interest in the history associated with this story.

I know that doesn't have anything to do with your engine but I wanted to shed some history on Jumbo's Racing Engines in Torrance, CA.

LC for lockport foundry.