3959512 large journal 4 bolt block
02-24-2012, 09:01 PM
#21
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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.
02-24-2012, 10:04 PM
#23
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. 
Dave
Dave
02-24-2012, 10:54 PM
#24
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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.
Tom Parsons
02-25-2012, 10:43 AM
#25
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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? Dave
http://forums.corvetteforum.com/pict...ictureid=84339
Davehttp://forums.corvetteforum.com/pict...ictureid=84339
Last edited by dkleather; 02-25-2012 at 11:09 AM.
02-25-2012, 01:32 PM
#26
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02-25-2012, 08:02 PM
#27
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? Dave
http://forums.corvetteforum.com/pict...ictureid=84339
Davehttp://forums.corvetteforum.com/pict...ictureid=84339
The only 327 bock casting in 63 was the 870.
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Spowell637 (04-09-2024)
02-26-2012, 03:28 AM
#29
Drifting
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
02-26-2012, 12:54 PM
#30
Melting Slicks
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?
Whats a decent price for one of these, and is the small journal more desirable for a 340 clone?
02-26-2012, 01:16 PM
#31
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02-26-2012, 04:55 PM
#33
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 .
02-26-2012, 05:50 PM
#34
Melting Slicks
02-26-2012, 06:23 PM
#35
Drifting
now mine could even be 73 cast with vent hole in rear of block and get this my block accepts a new style filter after removal of canister oil filter adapter. also machine shop that broke it down said it had 0010 block castings inside .I have to get a look at pad ID # and post later on .small journal forged crank two bolt main caps .
02-26-2012, 06:35 PM
#36
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Do you know the casting date? Is it a small journal or large?
Tom
Do you know the casting date? Is it a small journal or large?
Tom
Last edited by Tom Heffernan; 02-26-2012 at 07:23 PM.
02-26-2012, 07:52 PM
#38
Drifting
02-26-2012, 10:40 PM
#40
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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.
Last edited by jimh_1962; 02-26-2012 at 10:43 PM.
