Engine Identification Help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69ChevySB · 01-20-2003, 06:33 PM

Hi folks, I posted a thread yesterday on help identifying my engine and you guys told me to get the number...I couldnt find the thread again, but here's the number. it's right behind the valve cover on the driver side.. hope this helps....can anyone tell me what kind of motor I have by this number?

GM
3970020

**John Fabris** · 01-20-2003, 06:41 PM

Number = 3970020
Cubic inch = 307
Years = 70-73
main caps = 2

**pound41** · 01-20-2003, 06:45 PM

That is a casting# meaning that was the block # which was one of several that were used to denote a small block v-8. That number was used from the mid 60's through early 80's. to find out what you really have youneed to look on the front of the motor on passenger side. Below the head you will see a small flat area called the pad. On it will be a couple of letters. they will tell you specific egine type. and letters will tell you the date

69ChevySB · 01-20-2003, 08:13 PM

There were also these numbers right by the waterpump in the front of the motor on the passenger side... it had this number in real small letters...

11W340877
and it had these numbers right next to it in bigger letters..
V07O7CCC

**68 Stepside** · 01-20-2003, 08:19 PM

1971 CCC 307 trans: Powerglide h.p.: 200 bbls: 2 body style: A F X/Monte

01-20-2003, 06:33 PM	#1
69ChevySB dropped69 Join Date: Jan 2003 Location: Grand Canyon State Posts: 120	Engine Identification Help Hi folks, I posted a thread yesterday on help identifying my engine and you guys told me to get the number...I couldnt find the thread again, but here's the number. it's right behind the valve cover on the driver side.. hope this helps....can anyone tell me what kind of motor I have by this number? GM 3970020

01-20-2003, 06:41 PM	#2
John Fabris TOTY 2006 Join Date: Dec 1999 Location: Magalia CA USA Posts: 2,270	Number = 3970020 Cubic inch = 307 Years = 70-73 main caps = 2 __________________ John Fabris 67 C10 SWB

01-20-2003, 08:13 PM	#4
69ChevySB dropped69 Join Date: Jan 2003 Location: Grand Canyon State Posts: 120	engine identification There were also these numbers right by the waterpump in the front of the motor on the passenger side... it had this number in real small letters... 11W340877 and it had these numbers right next to it in bigger letters.. V07O7CCC

01-20-2003, 08:19 PM	#5
68 Stepside huh? Join Date: May 2000 Location: Washington, Illinois Posts: 5,692	1971 CCC 307 trans: Powerglide h.p.: 200 bbls: 2 body style: A F X/Monte __________________ Someday when I'm lonely, Wishing you weren't so far away, Then I will remember Things we said today. RIP El Jay

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01-20-2003, 06:45 PM	#3
pound41 Registered User Join Date: Dec 2002 Location: Northern Virginia Posts: 1,269	That is a casting# meaning that was the block # which was one of several that were used to denote a small block v-8. That number was used from the mid 60's through early 80's. to find out what you really have youneed to look on the front of the motor on passenger side. Below the head you will see a small flat area called the pad. On it will be a couple of letters. they will tell you specific egine type. and letters will tell you the date



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