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

**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?

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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