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seams like theres a lot to know about these blocks, I have a machine shop and have seen 10's of thousands of small blocks and never came across one of these. the date code is D ? 6 (2nd number is not clear) the pad stamping is CE6P23780 maybe someone knows how to decifer the stamp also.
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and the block came from the factory a 4 bolt, not converted by a machine shop.
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Originally Posted by dkleather
(Post 1580095667)
The 512 block in my 64 built Sept.1, 1963 has a casting date of H-18-3 or Aug. 18, 1963. A recent rebuild showed it to be a small journal. It has a blank pad and no CE marking. Since the bore and pistons were original I don't think it had ever been decked. It is date correct for the car so it must have been a service replacement quite soon in the car's use. :thumbs: Dave
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1 Attachment(s)
Originally Posted by topls69
(Post 1580105514)
seams like theres a lot to know about these blocks, I have a machine shop and have seen 10's of thousands of small blocks and never came across one of these. the date code is D ? 6 (2nd number is not clear) the pad stamping is CE6P23780 maybe someone knows how to decifer the stamp also.
Attachment 48184570 Tom Parsons |
Originally Posted by oldskydog
(Post 1580106077)
That would be 73, not 63.
http://forums.corvetteforum.com/pict...ictureid=84339 |
Originally Posted by topls69
(Post 1580105514)
the date code is D ? 6 (2nd number is not clear) the pad stamping is CE6P23780 maybe someone knows how to decifer the stamp also.
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Originally Posted by dkleather
(Post 1580108989)
Not sure why you say this. It fits the description of a pre-68 engine as described in Post #7 above by DZAuto about the history of the 512. Small journal, two bolt main, no CE on the block pad, rear vent tube, original style steel valve covers. Other posts above also seem to verify my thinking. Could you explain further, please? :thumbs: Dave
http://forums.corvetteforum.com/pict...ictureid=84339 The only 327 bock casting in 63 was the 870. |
Big journal
I'm not clear on the block differences between one's with road draft holes and those without. Could someone post pictures showing the differences.
Thanks, Fast Jimmy |
Originally Posted by topls69
(Post 1580086359)
Hi guys, I stumbled across a block and was wondering what it was. Im an engine machinist and didnt have a clue as to what this was. I did a google search, and seams like its kind of a rare bird, I founda lot of info on this site. I think I have one thats even more rare. I have a standard 4 inch bore, large journal,with a vent hole and 4 bolt main 3959512 block, it does hace CE on the front pad, I dont know what kind of starting asking price would be reasonable for this block. I also have several other283 and 327 blocks,427 heads and dont know where the best place is to sell this stuff.I prefer to stay away from ebay(just because its a pain) any tips or suggestions would be great, thanks
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I have been looking for a 383/400 that would allow me to use the finned valve covers....(looking for a sleeper for my 63)...didnt know this block was what Im looking for.
Whats a decent price for one of these, and is the small journal more desirable for a 340 clone? |
1 Attachment(s)
Originally Posted by Fast Jimmy
(Post 1580114087)
I'm not clear on the block differences between one's with road draft holes and those without. Could someone post pictures showing the differences.
Thanks, Fast Jimmy |
512 Block
1 Attachment(s)
And, to confuse things more, here is a picture of a 512 block without the breather hole.
Attachment 48184571 |
Originally Posted by tach drive 61
(Post 1580115446)
my 512 327 block is 63 and has small journal forged crank two bolt mains. price i paid two years ago still in crate $1250 less heads and cam shaft ! the selling section on this forum would be best .hearing the words from jim glass I have a 327 crate motor FS were welcome words .
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Originally Posted by rongold
(Post 1580119225)
And, to confuse things more, here is a picture of a 512 block without the breather hole.
http://i306.photobucket.com/albums/n...M/512block.jpg :cheers: Harry |
Originally Posted by oldskydog
(Post 1580119813)
I give up.
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Rongold
Do you know the casting date? Is it a small journal or large? Tom |
Originally Posted by JohnZ
(Post 1580101450)
Yes - they were machined for both SJ and LJ applications. :thumbs:
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Originally Posted by Tom Heffernan
(Post 1580120659)
Rongold
Do you know the casting date? Is it a small journal or large? Tom |
There is no way to tell small journal from large journal crank w/o removing pan?
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There is a book which described the different blocks including the cranks. I remember comparing my block and the crank and found it was a small journal with a 4577 forged crank. The casting date has "B184". So it has to be from Feb 18th 74 correct? On my bock the pad was grounded down during the machining. Though I remember it had CE as the prefix. It does have the breather and a later style oil filter.
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