I have a chevy SB engine that came with a 1969 RS/Z-28 I purchased in 1979. I was told that the engine came from wrecked 1969 Camaro. I have long since sold that car, but still have the block and crankshaft. I think that I have the crank I.D. figured out as this has a casting no. of 1178, but the block is the one that has me confused, and I hoping someone here can send me in the right direction.
The casting number on the block is as follows:3959512, which from what I've found on the casting lists shows this engine as a 1962-1963 327 2 bolt main, yet this is a 4 bolt main engine.
The date code on the engine is: K68
The engine ID code is: V1I19DZ 19N550021
Any help on this would be appreciated.
Thanks, Scott

The sites I checked all has it as a 327 2 bolt also. So the 4 bolt main is confusing.

got any pics of those #'s would love to see them also if possible 3959512....327...62-67...2.bolt..Was also used for some "CE" replacement blocks Ya got me definetly something messed up there. for starters a 327 wouldnt have aDZ STAMP 302 would

I would have to see the pic's of the vin stamp sounds like a re-stamp so far. block casting defnetly indicates 327 2 bolt you say its a 4 bolt pic's? r u sure that you read casting correct?

I just checked again and maybe I'm missing something, but the only thing that maybe questionable is one number in the sequence 19N550021. I can take pics, but I'm not sure how to post them, but would be happy to e-mail them for someone to look at.
Thanks again I appreciate the help.
Scott

http://sc.groups.msn.com/tn/0A/C2/ScottsWorld/1/12.jpghttp://sc.groups.msn.com/tn/0A/C2/ScottsWorld/1/11.jpghttp://sc.groups.msn.com/tn/0A/C2/ScottsWorld/1/15.jpghttp://sc.groups.msn.com/tn/0A/C2/ScottsWorld/1/16.jpghttp://sc.groups.msn.com/tn/0A/C2/ScottsWorld/1/17.jpghttp://sc.groups.msn.com/tn/0A/C2/ScottsWorld/1/18.jpg Sorry but this seems to be the largest size pic I can get on this reply. Hope you can see them.

These may be better.

A couple more

Last two.

ok I have found some info here is a link that better shows what the 512 block is http://www.camaros.org/drivetrain.shtml#BlockCastI also have sent the pics to some very well know camaro guys that have a database for reuniteing motors to the original cars i there still out there.IT looks like you have a 302 motor out of a 69 z28 to me Ill post up more info when they reply to me

I see the "512" on your link, but unless I'm reading that wrong that is a 3963512 which is for a big block. Mine is a 3959512. My wife reminded me I had some old paperwork from the Camaro, and she went up in the attic and dug out a couple of boxes of stuff. Many years ago I did get some info. from Jim Schwartz who used to work upstairs in the pattern shop at the Grey Iron plant here in Saginaw. He gave me 24 pages worth of casting numbers for blocks, cranks, exhaust/intake manifolds, differential housings/carriers, cylinder heads,camshafts, and bearing caps. I attached a page from the cylinder block section and it shows a 3959512 in 1968 as a 327cu.in. but it's also listed as change #.
Again I'm still in the dark as to what I have.

ORIGINAL: MTH trains

I see the "512" on your link, but unless I'm reading that wrong that is a 3963512 which is for a big block. Mine is a 3959512. My wife reminded me I had some old paperwork from the Camaro, and she went up in the attic and dug out a couple of boxes of stuff. Many years ago I did get some info. from Jim Schwartz who used to work upstairs in the pattern shop at the Grey Iron plant here in Saginaw. He gave me 24 pages worth of casting numbers for blocks, cranks, exhaust/intake manifolds, differential housings/carriers, cylinder heads,camshafts, and bearing caps. I attached a page from the cylinder block section and it shows a 3959512 in 1968 as a 327cu.in. but it's also listed as change #.
Again I'm still in the dark as to what I have.

dont look at the chart read the paragraph below it it address the 512 block I have just been told that is a rare block definetly has factory vin stamp on it it is a 302 z28 block and the crank 1178 is also used in z28 ( expensive one 2) there is a few guys that put that site i linked for you together One of them guys is corresponding with me about this. They only have (6) of the 512 blocks in there registry. I will pm you the link where this discussion is going on

this is the paragraph below the chart ........The 3970010 casting was only used during the latter half of 69 Camaro production (for 302 and 350 applications), but the block continued to be produced throughout the 70's for 350 applications and is one of the most common engine blocks. The 3932388 block is sometimes noted as being 'rare', but it actually was commonly used in mid-69 production. Also, there is a 3959512 block that has been found very infrequently in some 69 Camaros. Not much is known about usage of this block, but it is a 4" bore block, thus could have 302, 327, or 350 applications.

now put that with the DZ stamp which is a factory stamp not a restamp backed up with the 1178 crank you have a 302 z28 block and crank

I'm sorry my bad, I did look at the chart and did not read the whole paragraph. I just took a look at the link you sent me and I apprciate all your help. If anyone would like to e-mail me with more info. please do: choochoocharlie65@hotmail.com Also if someone would want copies of the casting sheets from the Grey Iron plant please let me know.
Again, thanks for the help. Scott

ORIGINAL: MTH trains

I see the "512" on your link, but unless I'm reading that wrong that is a 3963512 which is for a big block. Mine is a 3959512. My wife reminded me I had some old paperwork from the Camaro, and she went up in the attic and dug out a couple of boxes of stuff. Many years ago I did get some info. from Jim Schwartz who used to work upstairs in the pattern shop at the Grey Iron plant here in Saginaw. He gave me 24 pages worth of casting numbers for blocks, cranks, exhaust/intake manifolds, differential housings/carriers, cylinder heads,camshafts, and bearing caps. I attached a page from the cylinder block section and it shows a 3959512 in 1968 as a 327cu.in. but it's also listed as change #.
Again I'm still in the dark as to what I have.

hey I know some guys that would love to have copies of that info or there database's the same guys that put that site together interested?

Hey scott I would like to see those copies email michaelds59@msn.com close ups if possible

appears that someone 4-bolted a 2-bolt. all 512s were 2-bolt 327s

ORIGINAL: scottlee1

appears that someone 4-bolted a 2-bolt. all 512s were 2-bolt 327s
completely incorrect http://www.camaros.org/drivetrain.shtml#BlockCastobviously you didnt take the time to read or look at the pic's

This page somewhat verifies that is uncommon, but possible to have a 3959512 block in a '69 Z/28...

http://www.camaros.org/drivetrain.shtml#BlockCast

ORIGINAL: Ircyklops

This page somewhat verifies that is uncommon, but possible to have a 3959512 block in a '69 Z/28...

http://www.camaros.org/drivetrain.shtml#BlockCast
correct now look at the pics you dont find a dz stampedblock on any 327period! that is a factory stamp its a 302 engine and it is for real its not the only one out there either also there are 350 512 blocks. I just would like to say that CRG has the most well know camaro guys in the country that not only put that site together but have verified this motor dicussed here as an factory original 302 dz

I picked up one of these short blocks at a local swap meet this weekend & went looking to see what I could find on it. I could not finda 3959512 block listed in any of the Chevrolet by the Number series. So I did a search & found this post. Here's the details: Original shortblock only has been decked so there are no stamped numbers left to read. I should mention here that the guy that I bought it from had torn it down & bored & decked the block. He insisted that the block & crank appeared to have been together all of the engines life. It is a 2-bolt block. Block casting date is I*20*8 which should be September of 1968. 1969 model year. The guy had been told that it was an early 327. But it is a large journal engine. And it is not an early 327 date. Crank casting number is #1182. And that is where it got a little more interesting. According to Chevy by the Numbers, the crank is listed only as a 1967 350/295, forged steel, large journal, aaaaaaaaannnnnnnnnnnnddddddddddd (drum roll) Z28 Camaro only! So at the very least Chevy by the Numbers has a missprint somewhere here. Anyone else have any thoughts on it?

I'd like to share some information on a 3959512 motor that I have in my possession and have known since 1971. It is a CE motor and was put in my 65 Nova in very late 69 or early 70 to replace the fried 327/300. It is a factory 2 bolt small journal, casting date J29, canister oil filter, and it came with domed pistons. It is not a Chevy II block.

I know this because I bought the car from the 2nd owner in Dec. '71, whohad to replace the motor @ ~58,000 miles. I got the car with ~73,000 miles on it.

Now I'm starting to wonder if it's a 327 (that's what I was told) or what?

I apologize for being off topic (Nova/Chevy II), but I have been searching the web for information on this motor and came across your forum.

Mike

3959512 casting was only a 327 block, 1962-67, and was also used as a replacement block.
http://www.chevy-camaro.com/chevy-camaro-chevy-engine-block-codes.asp?group=1

No argument that all the resources we've seen/have list the casting as a 62-67 block. I have let Mortec know that this block was cast in October 1969. To others on the list, I was advising them that this block came with domed pistons. It was a factory CE replacement block.

Question: how do I locate the crank casting number?

ORIGINAL: Trbomike
Question: how do I locate the crank casting number?

http://www.chevy-camaro.com/parts/chevy-camaro-part-codes-crank.htm

Sorry for not being clear on my request. The crank is in the motor. Where do I look for the numbers on the crank? or does the crank need to be out? Thanks!

Youat least need to have theoil pan off to see the numbers.

I have it out and down to the shorblock. Pan is off.

OK, there should be a number cast onto the face of one of the counterweights of the crank, might be on one closer to the front of the engine.