What engine am I working with here!? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

blazerboy_4life · 01-18-2011, 02:14 PM

Im having a hell of a time finding figuring out what exactly im working with here. Ive checked all over the forums and i keep ending up at broken links and expired websites. The number on the back side of the block is 3970010 so Ive gathered its a 350, as it should be. I was told this motor is a 350 bored .040 over out of a 72 C10. The motor is stripped down and sitting on an engine stand right now so if theres any other numbers i need to find that would help identify let me know.

I see 3 different numbers there
1st) V0830TBM
2ND) 7398
3RD)C97106606

pseudopimp · 01-18-2011, 02:28 PM

i did a quick search in google and found this.

http://www.thedirtforum.com/castings.htm

3970010 68 - 79 350 & 327 145-375 2&4-Bolt mains/Truck/Hi Perf

jborders · 01-18-2011, 02:29 PM

yep thats what i came up with also.

**425HP409** · 01-18-2011, 02:31 PM

A good source for the information you are looking for is www.nastyz28.com
He shows that you have a 350 block, built in Flint, August 30, for a 69-79 car, truck or vette with either 2 or 4 bolt mains.

**John Fabris** · 01-18-2011, 02:33 PM

V=Flint
08=August
30= 30th day of month
TBM was used for three different engines/years.
1. year=1970 Size=307 1/2 ton trucks
2. year=1979 Size=350 3/4 to 1 ton trucks
3. year=1985 Size=305 1/2 to 3/4 ton trucks.

However, your block number indicates
1969-79 3970010 350, So with those two codes, you have a 1979 350 block.

Kinda iffy, but the only other thing you could refer to is the heads, and what they are, but chances are they could have been swapped at one point.

The other numbers on the engine pad, no clue other then maybe put there as part of a warranty exchange or record number by a machine shop?

blazerboy_4life · 01-18-2011, 02:47 PM

Quote:

Originally Posted by John Fabris

V=Flint
08=August
30= 30th day of month
TBM was used for three different engines/years.
1. year=1970 Size=307 1/2 ton trucks
2. year=1979 Size=350 3/4 to 1 ton trucks
3. year=1985 Size=305 1/2 to 3/4 ton trucks.

However, your block number indicates
1969-79 3970010 350, So with those two codes, you have a 1979 350 block.

Kinda iffy, but the only other thing you could refer to is the heads, and what they are, but chances are they could have been swapped at one point.

The other numbers on the endine pad, no clue other then maybe put there as part of a warrenty exchange or record number by a machine shop?

Thank You! Thats exactly what I was looking for. Ill look at the heads and see what I come up with.

01-18-2011, 02:14 PM	#1
blazerboy_4life 70Custom10 Join Date: Jan 2010 Location: Rapid City, SD Posts: 322	What engine am I working with here!? Im having a hell of a time finding figuring out what exactly im working with here. Ive checked all over the forums and i keep ending up at broken links and expired websites. The number on the back side of the block is 3970010 so Ive gathered its a 350, as it should be. I was told this motor is a 350 bored .040 over out of a 72 C10. The motor is stripped down and sitting on an engine stand right now so if theres any other numbers i need to find that would help identify let me know. I see 3 different numbers there 1st) V0830TBM 2ND) 7398 3RD)C97106606 Attached Images

01-18-2011, 02:28 PM	#2
pseudopimp Registered User Join Date: May 2010 Location: Las Cruces NM Posts: 85	Re: What engine am I working with here!? i did a quick search in google and found this. http://www.thedirtforum.com/castings.htm 3970010 68 - 79 350 & 327 145-375 2&4-Bolt mains/Truck/Hi Perf __________________ 84 Scottsdale LWB K10 Rooting against the cowboys is almost as fun as rooting for the GIANTS! Last edited by pseudopimp; 01-18-2011 at 02:28 PM.

01-18-2011, 02:29 PM	#3
jborders Registered User Join Date: Sep 2007 Location: pontiac, illinois Posts: 85	Re: What engine am I working with here!? yep thats what i came up with also.

01-18-2011, 02:31 PM	#4
425HP409 425hp409 Join Date: Oct 2008 Location: Prosper Texas Posts: 833	Re: What engine am I working with here!? A good source for the information you are looking for is www.nastyz28.com He shows that you have a 350 block, built in Flint, August 30, for a 69-79 car, truck or vette with either 2 or 4 bolt mains. __________________ Charles 68 SWB, Dad bought new, now 396 & factory ac 64 Impala SS, 409 425HP, 4 speed AC 64 Bel Air Wagon, 400 Small Block 57 Bel Air all original 283 w/Factory Air 77 GMC Sprint, 454/425HP 67 Olds 442, all original 90 ZR1 Corvette

01-18-2011, 02:33 PM	#5
John Fabris TOTY 2006 Join Date: Dec 1999 Location: Magalia CA USA Posts: 2,270	Re: What engine am I working with here!? V=Flint 08=August 30= 30th day of month TBM was used for three different engines/years. 1. year=1970 Size=307 1/2 ton trucks 2. year=1979 Size=350 3/4 to 1 ton trucks 3. year=1985 Size=305 1/2 to 3/4 ton trucks. However, your block number indicates 1969-79 3970010 350, So with those two codes, you have a 1979 350 block. Kinda iffy, but the only other thing you could refer to is the heads, and what they are, but chances are they could have been swapped at one point. The other numbers on the engine pad, no clue other then maybe put there as part of a warranty exchange or record number by a machine shop? __________________ John Fabris 67 C10 SWB Last edited by John Fabris; 01-18-2011 at 05:23 PM.



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