Engine size? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Chevypower292 · 01-24-2009, 11:04 AM

Well I've got a question, Its about the size of the engine in my truck..

When I bought it the guy claimed it had a 305 in it. Well I knew if it had a 305 then it'd been changed since they didn't come with a 305..Well not only that but the oil dip stick is on the wrong side for it to be a 305. So I was able to get the numbers off of the engine. If someone wouldn't mind running them and seeing what size it really is that'd be great!

Here are the numbers as best I could see them... 12W387811 VO612CTK

On a side note I've got a website to run the trucks VIN thru and all it says is it did indeed have a V8 which I knew already...lol

69gumby · 01-24-2009, 11:20 AM

The CTK suffix code says it could be a 305. It also could be a 307 or a 400. these were built in 72-78. Check out nastyz28.com they have all the numbers.

lowriden58 · 01-24-2009, 11:28 AM

im gonna say its a 307

69gumby · 01-24-2009, 11:30 AM

Oh yea, The V =Flint Mich. Plant, 06 =June, 12 =The 12th day of June. There is also mortec.com, they have a ton of numbers.

Chevypower292 · 01-24-2009, 02:37 PM

Odd...My numbers are not listed on mortec.com or Nastyz28.com

69gumby · 01-24-2009, 02:55 PM

The information I looked up for you came from nastyz28.com. Of the numbers you put on your thread the first numbers are partial VIN numbers, the one ending in CTK is the Suffix code, thats what I broke down for you. The other useful number is on the drivers side of the block near the bell housing, the casting number. The casting number is kind of hard to see but if it's not to dirty back there you can take a blind shot with a camera or use a flashlight and a mirror.

sweet70beast · 01-24-2009, 02:58 PM

Here's a link to location http://www.mortec.com/location.htm

Tx Firefighter · 01-24-2009, 03:07 PM

Quote:

Originally Posted by Chevypower292

Well I've got a question, Its about the size of the engine in my truck..

When I bought it the guy claimed it had a 305 in it. Well I knew if it had a 305 then it'd been changed since they didn't come with a 305..Well not only that but the oil dip stick is on the wrong side for it to be a 305. So I was able to get the numbers off of the engine. If someone wouldn't mind running them and seeing what size it really is that'd be great!

Here are the numbers as best I could see them... 12W387811 VO612CTK

On a side note I've got a website to run the trucks VIN thru and all it says is it did indeed have a V8 which I knew already...lol

Depending on the year, a 305 could have had the dipstick on the driver (early 305s) or the passenger side (later 305s). They made 305s a long time.

Chevypower292 · 01-24-2009, 04:45 PM

Quote:

Originally Posted by Tx Firefighter

Depending on the year, a 305 could have had the dipstick on the driver (early 305s) or the passenger side (later 305s). They made 305s a long time.

The reason I said that is because a friend who works on them told me that...looks like he needs to learn more.lol. I'm more of a small engine mechanic. lol

Also thanks Gumby.. I miss read your post before. It seems I was looking at the wrong numbers while trying to find it...I've found what your talking about now.

Tx Firefighter · 01-24-2009, 04:58 PM

Don't get sad if it is a 305 though. The 305 is like larger women, some guys really like them even if their reputation isn't popular.

Signed,
Kevin the Chubby Chaser

69gumby · 01-24-2009, 04:58 PM

Hey, glad to help out. I just started learning about all these numbers as I just picked up an engine I'm going to rebuild. Now I'm into looking for some heads so I have all the head numbers I carry with me now as I go through the wrecking yards and CL.

Mortec and Nastyz28 did all the work.

Chevypower292 · 01-24-2009, 05:15 PM

Quote:

Originally Posted by Tx Firefighter

Don't get sad if it is a 305 though. The 305 is like larger women, some guys really like them even if their reputation isn't popular.

Signed,
Kevin the Chubby Chaser

Well I don't mind a 305 in cars..Never really cared from them in a truck. BUT, the guy I bought it from claims it was mildly built. I've not really seen any signs of it...It just has headers on it and now its got a Holley 600 Double pumper on it...I've also just bought a set of three inch pipes from the headers back...Got short Flowmasters on it..almost new removed from a '71 longbed..I'll have those put on soon. So it should have a nice little rumble to it.

Gumby. Your right about the sites...Thanks again tho.

EDIT: Just incase anyone wondered what I give for the carb or the pipes..$80 for the carb and $100 for the pipe and mufflers...Both things was used a very short time.

Chevypower292 · 01-25-2009, 05:20 PM

Well guys I was ab le to get inside the engine area and see the numbers on the back on the block..They are 3970020..If I read that right on Mortec.com That is a '69-'73 307 in my truck.

**Ron 586** · 01-25-2009, 06:07 PM

I have used this site for years with good results when looking up numbers .

http://www.chevymania.com/

01-24-2009, 11:04 AM	#1
Chevypower292 Registered User Join Date: Oct 2008 Location: Lake City, Tennessee. Posts: 72	Engine size? Well I've got a question, Its about the size of the engine in my truck.. When I bought it the guy claimed it had a 305 in it. Well I knew if it had a 305 then it'd been changed since they didn't come with a 305..Well not only that but the oil dip stick is on the wrong side for it to be a 305. So I was able to get the numbers off of the engine. If someone wouldn't mind running them and seeing what size it really is that'd be great! Here are the numbers as best I could see them... 12W387811 VO612CTK On a side note I've got a website to run the trucks VIN thru and all it says is it did indeed have a V8 which I knew already...lol Last edited by Chevypower292; 01-24-2009 at 11:05 AM.

01-24-2009, 11:20 AM	#2
69gumby Registered User Join Date: Nov 2007 Location: Sacramento California Posts: 194	Re: Engine size? The CTK suffix code says it could be a 305. It also could be a 307 or a 400. these were built in 72-78. Check out nastyz28.com they have all the numbers. __________________ 69 sweet long fleet, David

01-24-2009, 11:28 AM	#3
lowriden58 Registered User Join Date: Jan 2008 Location: Chesapeake Beach, MD Posts: 812	Re: Engine size? im gonna say its a 307 __________________ 71 cheyenne lwb 300rwhp best 1/4 time so far 12.8 @103 http://i195.photobucket.com/albums/z...en58/001-2.jpg

01-24-2009, 11:30 AM	#4
69gumby Registered User Join Date: Nov 2007 Location: Sacramento California Posts: 194	Re: Engine size? Oh yea, The V =Flint Mich. Plant, 06 =June, 12 =The 12th day of June. There is also mortec.com, they have a ton of numbers. __________________ 69 sweet long fleet, David

01-24-2009, 02:37 PM	#5
Chevypower292 Registered User Join Date: Oct 2008 Location: Lake City, Tennessee. Posts: 72	Re: Engine size? Odd...My numbers are not listed on mortec.com or Nastyz28.com Last edited by Chevypower292; 01-24-2009 at 02:41 PM.

01-24-2009, 02:55 PM	#6
69gumby Registered User Join Date: Nov 2007 Location: Sacramento California Posts: 194	Re: Engine size? The information I looked up for you came from nastyz28.com. Of the numbers you put on your thread the first numbers are partial VIN numbers, the one ending in CTK is the Suffix code, thats what I broke down for you. The other useful number is on the drivers side of the block near the bell housing, the casting number. The casting number is kind of hard to see but if it's not to dirty back there you can take a blind shot with a camera or use a flashlight and a mirror. __________________ 69 sweet long fleet, David

01-24-2009, 02:58 PM	#7
sweet70beast Registered User Join Date: Sep 2006 Location: Shelley Idaho Posts: 876	Re: Engine size? Here's a link to location http://www.mortec.com/location.htm __________________ 1970 Nova 327/T5 (my 1st car) 1971 K-20 350/350/205 (winter DD) 1953 GMC Suburban 1968 Chevy Bel Air 1976 Chev C-10 1972 Skylark (suncoupe) 1 of 3943 made Last edited by sweet70beast; 01-24-2009 at 03:09 PM.

01-24-2009, 04:58 PM	#10
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Engine size? Don't get sad if it is a 305 though. The 305 is like larger women, some guys really like them even if their reputation isn't popular. Signed, Kevin the Chubby Chaser __________________ I'm on the Instagram- @Gearhead_Kevin

01-24-2009, 04:58 PM	#11
69gumby Registered User Join Date: Nov 2007 Location: Sacramento California Posts: 194	Re: Engine size? Hey, glad to help out. I just started learning about all these numbers as I just picked up an engine I'm going to rebuild. Now I'm into looking for some heads so I have all the head numbers I carry with me now as I go through the wrecking yards and CL. Mortec and Nastyz28 did all the work. __________________ 69 sweet long fleet, David

01-25-2009, 05:20 PM	#13
Chevypower292 Registered User Join Date: Oct 2008 Location: Lake City, Tennessee. Posts: 72	Re: Engine size? Well guys I was ab le to get inside the engine area and see the numbers on the back on the block..They are 3970020..If I read that right on Mortec.com That is a '69-'73 307 in my truck.

01-25-2009, 06:07 PM	#14
Ron 586 RIP Mr Ron Join Date: Dec 2005 Location: Big Sandy, Tn. 38221 Posts: 8,166	Re: Engine size? I have used this site for years with good results when looking up numbers . http://www.chevymania.com/ __________________ Ron (Mr Round Tuit) Be kinder than necessary, for everyone you meet is fighting some kind of battle TN Message Forum TN Facebook Group SETN Truck Show My Photobucket Last edited by Ron 586; 01-25-2009 at 06:07 PM.



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