Big Block Question

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Jan 14, 2015 | 05:53 PM

nelson007

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From: Westminster Md

Big Block Question

How long did they make the 3904351 block 2 bolt?
Did they use this block in the Corvettes after 1967?
Thanks,
Nelson007

Jan 14, 2015 | 05:58 PM

Nowhere Man

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the 351 block was used in 67 only in Corvette, Impalas, and sold over the counter. 68 used the 321 block. the 321 block has been seen in the last week production 67 cars

Jan 14, 2015 | 07:15 PM

roberts427

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From: Wolcott CT.

351 blocks

Quote:

Originally Posted by Nowhere Man

the 351 block was used in 67 only in Corvette, Impalas, and sold over the counter. 68 used the 321 block. the 321 block has been seen in the last week production 67 cars

there were a few (very few ) used in late 66.

Jan 14, 2015 | 07:18 PM

Nowhere Man

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Quote:

Originally Posted by roberts427

there were a few (very few ) used in late 66.

I don't buy into that I seem to recall a few 942 blocks were used the first week of 67 production

Jan 14, 2015 | 10:33 PM

nelson007

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From: Westminster Md

Hello Keith,
I know the 351 was used in 67, but most of them have a 4 bolt main. I have a 67 L68 that has a 2 bolt main.
How long was the 2 bolt main used? Was it just in 67?
Thanks,
Nelson

Jan 14, 2015 | 11:23 PM

oldskydog

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From: Mesa Az

2 bolt main for hydraulic lifter engines.....4 bolt main for solid lifter engines. Same casting. different machining.
Your L-68 was a hydraulic lifter engine.

Jan 15, 2015 | 03:58 AM

nelson007

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From: Westminster Md

Thanks Skydog . Were they only made in 67 or were they also used in 68?
Thanks,
Nelson007

Jan 15, 2015 | 05:32 AM

Nowhere Man

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Quote:

Originally Posted by nelson007

Thanks Skydog . Were they only made in 67 or were they also used in 68?
Thanks,
Nelson007

GM casted and machined thousands of two bolt main BB from 65 up.

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Jan 15, 2015 | 09:23 AM

plaidside

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Here is a page from Alan Colvin's book.
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Jan 15, 2015 | 11:37 AM

#10

nelson007

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From: Westminster Md

Thanks Plaidside great information.

Neldon007

Quote:

Originally Posted by plaidside

Here is a page from Alan Colvin's book.
Joe

Jan 15, 2015 | 04:51 PM

#11

roberts427

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From: Wolcott CT.

67 blocks.

Quote:

Originally Posted by Nowhere Man

I don't buy into that I seem to recall a few 942 blocks were used the first week of 67 production

I have a 66 351 block with a vin# etc. on it that was in a 66 sitting on my engine stand. I know of 2 others also.

Jan 15, 2015 | 05:06 PM

#12

prestige6

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Quote:

Originally Posted by Nowhere Man

the 351 block was used in 67 only in Corvette, Impalas, and sold over the counter. 68 used the 321 block. the 321 block has been seen in the last week production 67 cars

My car was built the last week of production and has a 321 Block.

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