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97144 Posts in 11687 Topics by 4578 Members
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Author Topic: rebuilding engine  (Read 11806 times)
dab67
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« Reply #15 on: March 28, 2007, 01:53:12 PM »

Paul:

I saw that also. There is no mistaking the casting numbers of 3970010 on the block. That is why I questioned the date that this block was available. No where can I find the 0010 being used on the 307. There is also a blank line on nastyz28 that shows the TDB code but no reference to the type of engine. Could I have an Albatross here!!!!!! Or how about a experimental block Cool
As usual, I am making humor of my own inexperience in these matters.

If I can, tongiht I will try and get a picture of both the casting block number and the casting date. and the front pad.

Dave
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1968RSZ28
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« Reply #16 on: March 28, 2007, 03:09:49 PM »

Dave -

Could the casting number on the block be 3970020?  This is one of the casting numbers listed for the 1969-73 307 cid engine.  Then the engine suffix code would make sense.

Paul
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dab67
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« Reply #17 on: March 28, 2007, 05:50:50 PM »

Paul and JohnZ:

How about this?
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dab67
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« Reply #18 on: March 28, 2007, 05:54:14 PM »

Paul and JohnZ:

Here are the other two. The casting date is F208 not 2X208 now clue where they got that. The front pad I thought we got a good picture but the brightness of the paint did not allow the numbers to show. The suffix codes numbers are as stated before V0622TDB the Partial Vin is
T8E738987.

Dave
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dab67
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« Reply #19 on: March 28, 2007, 06:22:55 PM »

Paul and JohnZ:

A couple other numbers, I didn't take picture, don't know why but the numbers on the heads(camel hump no accessory holes) are 3890462 casting dates of B046 and B086  Feb. 4th and 8th of 66.
The intake number I believe I mentioned in another thread 3919803- 68 327 275hp or 325hp, 68 350 295 hp.
It appears I have a Heinz 57 engine!!!!!!!!!

Dave
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1968RSZ28
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« Reply #20 on: March 28, 2007, 09:07:58 PM »

Dave -

Based on your new info you have a 1978 350 cid Chevrolet block cast on June 20, 1978.  The engine was assembled at the Flint engine plant on June 22, 1978.  For what model I don't know,  the TDB engine suffix code doesn't show up anywhere for 1978.  Anybody else know?  Dave, can you clean (remove the paint) from the engine pad and recheck the numbers/letters?  This might "clear" things up.  Also, I can make out only two of your photos.

Paul  
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dab67
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« Reply #21 on: March 29, 2007, 04:50:39 AM »

Paul:

I figure the casting date photo and the front pad are the two you are referring to. the casting date is definetly F208 and the front pad we tried 6 different shots and could not get a good picture because of the paint being so bright that is why I wrote them down and presented them.

Dave
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lakeholme
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« Reply #22 on: March 29, 2007, 12:09:36 PM »

Dave,
Have you decided about your cam and carb, yet?
Are you staying with your powerglide?
« Last Edit: March 29, 2007, 12:12:36 PM by lakeholme » Logged

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dab67
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« Reply #23 on: March 29, 2007, 12:42:25 PM »

Hi Phillip:

Cam is going to be the 350/350 and the carb is going to be my stock Q-jet rebuilt. Or should i call it the carb that is on my engine!! I sure can not call it numbers matching or even date correct I bet!  Cheesy

Anyways, it will be a nice running motor by the time it is put all back together and the great thing about it is, they are going to install a dustcover for the flywheel! At least they say they are going to. They insist there are two different sizes dustcovers because there are two different size flywheels. I'll cross my fingers and hope for the best! But it sure would be nice to have it!!!!!!!! Also they are going to replace all the seals in regards to the tranny( dipstick, linkage, pump seal and whatever else) so I will not have to worry about that except for the cost of the seals. He is including the labor with the rebuild.

Should be done in about 2 more weeks. Just in time for the first cruise weekend in Kenosha!!!!!!! I'll keep you posted.

Thanks for asking!!!!!

Dave
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JohnZ
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« Reply #24 on: March 29, 2007, 01:54:37 PM »

"TDB" is a 350/175hp 4-barrel automatic truck engine; your block was cast on June 20, assembled on June 22, and came out of a 1978 GMC pickup built at the Pontiac Truck Assembly Center. The heads and intake are from '66 and '68.
« Last Edit: March 29, 2007, 01:56:41 PM by JohnZ » Logged

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dab67
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« Reply #25 on: March 29, 2007, 02:20:06 PM »

JohnZ:

Thanks for the confirmation regarding the engine usage. I was pretty sure of the dates of the heads and manifold. Now I have one other question. During the rebuild should I have the front pad numbers removed in the decking and left blank or should I just leave it alone? What is the common practice if there is a common practice for non-matching number engine blocks that are rebuilt.
Any opinion on that?

Thanks

Dave
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1968RSZ28
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« Reply #26 on: March 29, 2007, 02:58:40 PM »

John -

Where did you find the info for the "TDB" engine suffix code?  Thanks in advance.

Paul
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JohnZ
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« Reply #27 on: March 30, 2007, 10:57:26 AM »

JohnZ:

Thanks for the confirmation regarding the engine usage. I was pretty sure of the dates of the heads and manifold. Now I have one other question. During the rebuild should I have the front pad numbers removed in the decking and left blank or should I just leave it alone? What is the common practice if there is a common practice for non-matching number engine blocks that are rebuilt.
Any opinion on that?

Thanks

Dave

If decking is found to be necessary, it'll wipe out the numbers on the pad; very few shops have the 2-axis mill necessary to deck the block and save the pad numbers. Since the pad stamps aren't correct anyway, you could just leave it blank if you have it decked.
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« Reply #28 on: March 30, 2007, 10:58:51 AM »

John -

Where did you find the info for the "TDB" engine suffix code?  Thanks in advance.

Paul

About 40 years' worth of GM references and my own notes from many sources. Smiley
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dab67
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« Reply #29 on: March 30, 2007, 12:51:38 PM »

JohnZ:

Thanks for the opinion John, if it happens it happens, if not I won't worry about it.

Dave
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