Did this ever exist?
I'm in the middle of an argument, and I'm saying no.

 

No, thats a 4 bolt main 350 block. Late 60s early 70s

 

Could also be a '68 vintage 327. Both the 327 and 350 had the same number 3970010.

 

I guess its listed on that Z28 site, but I've never heard of or seen one.

I have however seen plenty of the 0010 blocks in 2 and 4 bolt 350ci versions.

 

I don't believe any of the 327 cranks were used in those blocks by the factory but never say never. It would work.

 

Thanks for the info. I always thought the 010s were 4 bolt 350s. Thats the first motor I built as a teen. I took it as the gospel. Learn or remember (memory is a bitch sometimes) something new everyday.

 

Yup, not used in '68 Corvettes for some reason(?). Showed up in later '69 MY as a 350 and stayed until somewhere in the 1980 MY. The number was not exclusive to Corvettes, used across all car and truck lines. Vast majority were 2 bolt.

 

The 010 block casting was a VERY common 4in bore block. It was MACHINED in both 2 and 4bolt configurations. The width of the registers (that's the gap in the main web where the caps fit), FOR A SB, is what determines 2 or 4bolt configuration. AND, ONLY the center 3 webs got 4bolt caps in in the SB.
ANY (NOT just an 010) 4in bore block could be used to build a 302-327-350 (and in modified configuration, a 383). The ONLY difference in the above displacements was determined by the stroke: 3in, 3.25in, 3.48in and 3.75in strokes.
ALLLLLLLLLLLLLLLLLLLLLLLLLL 010 blocks were the large journal version (2.45in main journals-2.1in rod journals).
Large journal 327 were manufactured in BOTH 68 and 69. In 68, Vettes got the large journal 327, but in 69 they went to the 350.
AS FAR AS I KNOW, the FIRST 010 block was in 69. The FIRST 4bolt block was also in 69. Even though the first large journal 4in bore block was in 67 (SS350 Camaro ONLY), NEITHER the 67 nor the 68 blocks got 4bolt mains.
I personally have never observed nor had my hands on a 69 327 in an 010 block, but it is certainly possible that they were made. Also, I am NOT aware of any hi-perf version of the 69 327. They were all lo-perf engines, and if I remember correctly, they were primarily in full size sedans.
Thus, again to the best of my knowledge, the 69 010 blocks were ONLY used for 302 and 350 engines.
And as I'm sure all of you know, the 302 came one way and one way only. Period. It was the Z28, special Hi-perf engine with the solid lifter 30-30 cam, 11:1 compression, 2.02 heads and the tallest ever (factory) alum hi-rise intake manifold. The ONLY transmission was a 4sp.

Tom Parsons

 

I should have mentioned that the SBs that got 4bolt caps had the 3 center registers machined wider than the 2bolt blocks, whereas, the BBs ALLLLLLLLLLLLLL have the same width registers, REGARDLESS of 2 or 4bolt configuration. ALLLLLLLLLLLLLLL BB main caps are the same width. So when a BB gets 4bolt mains, then a cap with 4 holes is installed in the register, 4 holes drilled/tapped in the main webbing and then it is bored/finished honed.
For those of you who have ever noticed bare BB blocks with PASS-TRUCK-HIPERF cast into the block, this is why. The same block gets used for either application.
Again, for those of you who want to convert your 2bolt BB block into a "factory" 4bolt block, the cheapest method is to search out the junk 366 BB truck engines. They ALLLLLLLLLLLLL had 4bolt caps. Remove the caps, take your 2bolt 396-427-454 and the 366 truck caps to your friendly machinist and have them installed/line bored/honed. Voila, a 4bolt BB that only a VERY FEW people will ever know started life as a 2bolt block.

Tom Parsons

 

I totally agree with DZAUTO.

The 0010 block was never made by GM as a 327, however, it would be an easy build only requires the later 327 large journal crank and the 327 rods. NOTE: the 0010 was used for the 69 302 by destrocking it.

327carguy

 

Well, if you're in bed with him, how come your "LLLLLLLLLLLLLLLLLLLLL" key doesn't hang up like his?

 

Now, that is funny!! But I always enjoy Tom's posts!!

 

I do too! Just needs to fix that sticky key!

 

Too easy to build a cheap big journal 327. Simply use ANY 4in bore block and any 307 crank. Ya, ya, ya, ya, ya, the 307 cranks are cast instead of forged, but if properly balanced, you might be surprised at just how super one will run-----------------I was, back in 69 when I built one that way.

Sold it in 71 when I built a "home made" LT1 and used Chevy's first design offroad cam. DANG!
After that engine (about 73), I got into building SB400s and haven't looked back.

Tom Parsons

 

Big journal 307 cranks and large main blocks were pretty rare in '66, weren't they?

 

Whoops, fat fingered that one. I edited it for you. Sorry about that!

Tom Parsons

 

The nastyZ28 site lists the 0010 block being used as a 327 in A body cars for 1968. Do you know this not to be true?

 

Mike,
I don't know whether or not the 68 A-bodies (which of course was the Chevelle) got an 010 block. I've not personally seen a 68 Chevelle with an 010 block, but that's not to say they didn't exist. There certainly were a lot of 68 Chevelles with the 327 and there were several 68 Chevelles with the L79 option which was the hi-perf hyd cam 327.

Tom Parsons

 

I've got one of those '68 Chevelle L79 engines. The block casting number is #3914678 and if I remember correctly, the suffix was something like 'EP', before we decked the block. Has the steel crank and the heads are #291's. They supposedly rated them at 325 horses in the Chevelles due to some restrictions in intake setup/exhaust systems plus no doubt they wanted the Corvette to have the higher horsepower listing.
Mike T.

 

Probably 'cuz the 010 block didn't exist until 1969.