small block numbers - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1great68 · 11-22-2007, 09:08 PM

Can anyone tell me what the numbers stand for on the driver side back of the block 3970010.Any help would be great.

DREAMS OF A 67 · 11-22-2007, 09:21 PM

according to my book,3970010 was a 327 if made in 1968 and a 350 from 69-79 . if you can get the date code we might find more info.

DREAMS OF A 67 · 11-22-2007, 09:28 PM

The date code should be in the same area you found that number and will start with a letter and be followed by two,three,or four digits.

1great68 · 11-22-2007, 10:52 PM

The other number ia A227 on the ps back of block.

69step4x4 · 11-22-2007, 10:57 PM

what are the last 3 digits on passenger side in front of head ?

1great68 · 11-22-2007, 11:23 PM

Its hard to tell there is number on top of numbers i think its 25B or 625B

69step4x4 · 11-22-2007, 11:25 PM

on the long list the last 3 are25 b? hmmm let me see if that tells me, scrape it lightly with sand paper. i thought they should be all letters but ill look. brb

69step4x4 · 11-22-2007, 11:26 PM

nope that dont tell me anything

Gray Ghost · 11-22-2007, 11:29 PM

The 010 block is a high nickel content block and can be either 2 or 4 bolt mains. I prefer these blocks for rebuilds over the newer ones.

1great68 · 11-22-2007, 11:40 PM

I think i got it now.this row is smaller T7Z513625 then bigger ones are VO126TXB

69step4x4 · 11-22-2007, 11:58 PM

right from the comp.

TXB 1975 350 conv.cab L LS9 165 4 C-20 to 3500

1great68 · 11-23-2007, 12:17 AM

Is that a 2 bolt main or 4 bolt

69step4x4 · 11-23-2007, 12:20 AM

this 1 dont say, sorry

1great68 · 11-23-2007, 12:28 AM

TXB 1975 350 conv.cab L LS9 165 4 C-20 to 3500 What is the number 4 stand for. I looked it up and the 4 is in a column bbls.What is bbls stand for? What does the L LS9 stand for?

69step4x4 · 11-23-2007, 02:32 AM

im sure its 4 barrel carb

11-22-2007, 09:08 PM	#1
1great68 Registered User Join Date: Mar 2007 Location: ogden,utah Posts: 90	small block numbers Can anyone tell me what the numbers stand for on the driver side back of the block 3970010.Any help would be great.

11-22-2007, 09:21 PM	#2
DREAMS OF A 67 Step Brother Join Date: Sep 2007 Location: knoxville TN Posts: 1,950	Re: small block numbers according to my book,3970010 was a 327 if made in 1968 and a 350 from 69-79 . if you can get the date code we might find more info.

11-22-2007, 09:28 PM	#3
DREAMS OF A 67 Step Brother Join Date: Sep 2007 Location: knoxville TN Posts: 1,950	Re: small block numbers The date code should be in the same area you found that number and will start with a letter and be followed by two,three,or four digits.

11-22-2007, 10:52 PM	#4
1great68 Registered User Join Date: Mar 2007 Location: ogden,utah Posts: 90	Re: small block numbers The other number ia A227 on the ps back of block.

11-22-2007, 10:57 PM	#5
69step4x4 Registered User Join Date: Feb 2007 Location: Cottage Grove, Or Posts: 312	Re: small block numbers what are the last 3 digits on passenger side in front of head ? __________________ Lowered 2002 PT Cruiser ONLY for mileage. 1969 Stepside 4x4 ( under construction )

11-22-2007, 11:23 PM	#6
1great68 Registered User Join Date: Mar 2007 Location: ogden,utah Posts: 90	Re: small block numbers Its hard to tell there is number on top of numbers i think its 25B or 625B Last edited by 1great68; 11-22-2007 at 11:24 PM.

11-22-2007, 11:25 PM	#7
69step4x4 Registered User Join Date: Feb 2007 Location: Cottage Grove, Or Posts: 312	Re: small block numbers on the long list the last 3 are25 b? hmmm let me see if that tells me, scrape it lightly with sand paper. i thought they should be all letters but ill look. brb __________________ Lowered 2002 PT Cruiser ONLY for mileage. 1969 Stepside 4x4 ( under construction )

11-22-2007, 11:26 PM	#8
69step4x4 Registered User Join Date: Feb 2007 Location: Cottage Grove, Or Posts: 312	Re: small block numbers nope that dont tell me anything __________________ Lowered 2002 PT Cruiser ONLY for mileage. 1969 Stepside 4x4 ( under construction )

11-22-2007, 11:29 PM	#9
Gray Ghost Senior Member Join Date: Sep 2004 Location: Terrell, TX Posts: 1,967	Re: small block numbers The 010 block is a high nickel content block and can be either 2 or 4 bolt mains. I prefer these blocks for rebuilds over the newer ones. __________________ Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps.

11-22-2007, 11:40 PM	#10
1great68 Registered User Join Date: Mar 2007 Location: ogden,utah Posts: 90	Re: small block numbers I think i got it now.this row is smaller T7Z513625 then bigger ones are VO126TXB

11-22-2007, 11:58 PM	#11
69step4x4 Registered User Join Date: Feb 2007 Location: Cottage Grove, Or Posts: 312	Re: small block numbers right from the comp. TXB 1975 350 conv.cab L LS9 165 4 C-20 to 3500 __________________ Lowered 2002 PT Cruiser ONLY for mileage. 1969 Stepside 4x4 ( under construction )

11-23-2007, 12:17 AM	#12
1great68 Registered User Join Date: Mar 2007 Location: ogden,utah Posts: 90	Re: small block numbers Is that a 2 bolt main or 4 bolt

11-23-2007, 12:20 AM	#13
69step4x4 Registered User Join Date: Feb 2007 Location: Cottage Grove, Or Posts: 312	Re: small block numbers this 1 dont say, sorry __________________ Lowered 2002 PT Cruiser ONLY for mileage. 1969 Stepside 4x4 ( under construction )

11-23-2007, 12:28 AM	#14
1great68 Registered User Join Date: Mar 2007 Location: ogden,utah Posts: 90	Re: small block numbers TXB 1975 350 conv.cab L LS9 165 4 C-20 to 3500 What is the number 4 stand for. I looked it up and the 4 is in a column bbls.What is bbls stand for? What does the L LS9 stand for? Last edited by 1great68; 11-23-2007 at 12:32 AM.

11-23-2007, 02:32 AM	#15
69step4x4 Registered User Join Date: Feb 2007 Location: Cottage Grove, Or Posts: 312	Re: small block numbers im sure its 4 barrel carb __________________ Lowered 2002 PT Cruiser ONLY for mileage. 1969 Stepside 4x4 ( under construction )



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