BBC heads

« **on:** May 16, 2015, 05:28:56 PM »

I recently removed an engine from a boat that I had bought. I'm pretty sure they aren't worth too much in the boat world but to the right person in the car world could be worth some money. Does anyone have any info or familiar with these heads? The number on them is 3964291 year 72. I need to get the numbers off the block also and ill get some more pictures later

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« **Reply #1 on:** May 16, 2015, 07:18:44 PM »

Description found on Mortec

3964291....69-72...rect..CLOSED..396, 402, 427, 454, 109cc chamber, Large or small hex spark plugs used, crate motor usage in years after 1970.

What are you looking to do with them?

« **Reply #2 on:** May 16, 2015, 07:41:44 PM »

Not too sure yet, I'm going to take the engine down to the shop tomorrow to tear it down. I want to see what the block and specs of everything, I'm thinking someone with a 72 Camaro Chevelle corvette etc might pay some good money for something like this.

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« **Reply #3 on:** May 16, 2015, 09:16:53 PM »

Those heads are Worth 600 to 800

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« **Reply #4 on:** May 16, 2015, 10:59:09 PM »

A piece?

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« **Reply #5 on:** May 16, 2015, 11:03:36 PM »

For the pair

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« **Reply #6 on:** May 17, 2015, 06:51:11 AM »

Thanks

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« **Reply #7 on:** May 17, 2015, 06:46:12 PM »

Block numbers are A29•71 & 3963512 still needs to be taken apart and gone through haven't had any time.

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« **Reply #8 on:** May 17, 2015, 10:24:58 PM »

Is this a over the counter ls6 block? 3963512 is the casting number I know the 70 blocks are highly priced..

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« **Reply #9 on:** May 18, 2015, 09:11:21 AM »

Nobody has any info on these I can't find them with the same date stamped any help would be greatly appreciated

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« **Reply #10 on:** May 18, 2015, 12:02:46 PM »

I have the same set on my ls6 block in my 19 ft hornet runs like a champ, from what I've researched on them they're 106.9 cc closed chambers, 2.19 intake, 1.88 exhaust, with 325 cc runners.

« **Reply #11 on:** May 18, 2015, 12:13:54 PM »

Yeah I'm trying to find what the block actually is because the date stamped I can't find anything on it. Not sure if it ls6 or ls5 block or what not. I know the 69-70 is the ls6 right? This is a January 71 block not sure if they carried into the 71 year. Thanks for the info

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« **Reply #12 on:** May 18, 2015, 12:23:02 PM »

Do you have a similar block?

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« **Reply #13 on:** May 18, 2015, 01:02:18 PM »

No problem bro, the block I'm using is a 4 bolt high performance passenger block, it's casting # is 3999289 and it's a 454 and I believe the casting date is 73

« **Reply #14 on:** May 18, 2015, 01:11:14 PM »

3963512. 69-71 427/454 2 or 4 bolt copo is all i could find

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« **Reply #15 on:** May 18, 2015, 05:17:34 PM »

Thanks guys, yes I saw the copo numbers but I'm not to sure it's a copo if it is though that would be really nice. I just can't seem to find any date stamps that line up. I will find out more next week when I year the whole bottom end apart next week. Thanks again for everything.

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