307 or 327? Newbie question! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TruckinDaddy · 03-24-2005, 01:48 AM

I am trying to figure out what the CID is for the engine in my 68 1/2 ton, Long Step that I just got home this afternoon. I assume it has a 307 in it, since a 307 was standard for 68. Would a 327 show up on the glovebox sticker?

I have been told that I need to check the stamping on the rear of the block, near the tranny. Are there other ways to confirm which engine I have, that don't require pulling the engine?

I am going to be needing points/plugs and the like soon, and I want to make sure I get stuff for the correct engine.

skokie · 03-24-2005, 01:51 AM

I would say that if the truck had a 327 from GM in it then it would say it on the sticker. I thought I saw that on a post around here not that long ago. If you get the casting number off of the back of the engine right around the bellhousing on the driver side and to go www.mortec.com that would tell you.

TruckinDaddy · 03-24-2005, 01:56 AM

Quote:

Originally Posted by skokie

I would say that if the truck had a 327 from GM in it then it would say it on the sticker. I thought I saw that on a post around here not that long ago. If you get the casting number off of the back of the engine right around the bellhousing on the driver side and to go www.mortec.com that would tell you.

Cool. Thanks for the link.

skokie · 03-24-2005, 01:57 AM

No problem. Post back what you have in there.

JimKshortstep4x4 · 03-24-2005, 06:40 AM

Another option for you is to read the right front engine pad codes, (assuming the block has not been decked). If you look up the suffix code from the pad you can get the engine information from this site:

http://www.nastyz28.com/spmenu.html

Jim

TruckinDaddy · 03-24-2005, 08:55 AM

Quote:

Originally Posted by JimKshortstep4x4

Another option for you is to read the right front engine pad codes,

Cool I'll try to check that out today.

Thanks

70 shorty · 03-24-2005, 09:46 PM

Ok, I need some help here. I'm much more familiar with passenger car Chevy engines. I know if it were a 68 car engine it would have to be a 327 because If I remeber right, they didn't make the 307 until 69. Also, is the 307 in a truck the same 307 that is in passenger cars? I also know the 327 was replaced with a 350 in 69 in cars, are trucks the same?

**CPNE** · 03-24-2005, 09:56 PM

You know the truck has the original engine, right? If so, and the VIN starts with CE and the glovebox does not list an engine RPO, it's a 307, that simple. Also the manual choke is a clue too. In 68, 4bbl engines (327 & 396) had auto chokes and a cool choke delete on the gauge cluster. Your carb is a 2 bbl with a manual choke, right? If so, its another clue pointing to 307.

FYI, the 307 replaced the 289 in 68 as the base V8. The 350 repolaced the 327 in 69 as the optional small block. I'd like to see more pics of your truck, I've been following this with interest. Good engine for a driver IMO, but I'd still rather have an inline!

sneakysnake · 03-24-2005, 11:12 PM

307 replaced(283).. 289 is a F@rd.

TruckinDaddy · 03-24-2005, 11:26 PM

Quote:

Originally Posted by CPNE

You know the truck has the original engine, right? If so, and the VIN starts with CE and the glovebox does not list an engine RPO, it's a 307, that simple. Also the manual choke is a clue too. In 68, 4bbl engines (327 & 396) had auto chokes and a cool choke delete on the gauge cluster. Your carb is a 2 bbl with a manual choke, right? If so, its another clue pointing to 307.

FYI, the 307 replaced the 289 in 68 as the base V8. The 350 repolaced the 327 in 69 as the optional small block. I'd like to see more pics of your truck, I've been following this with interest. Good engine for a driver IMO, but I'd still rather have an inline!

Thanks for the good info. This is right along my line of thinking, too. So we must be right! Right?

Manual choke, yes, 2BBL, yes.

I think we have a winner. 307 it is, until I am proven wrong.

70 shorty, I have seen the same about 307, but it might have been when I was looking at car sites. Showing the 307 as base for 69 is part of my confusion.

JimKshortstep4x4, any clues about where to look on the front? The wire brush and I spent much of the afternoon under the truck, looking for any stampings or codes we could find. I could not find the right front engine pad codes (And sorry for the stupidity, but I don't know what "decked" means- but since this was a simple farm truck. And my grandpa was cheap. I doubt it has.

J Y Dog · 03-24-2005, 11:54 PM

Quote:

Originally Posted by 70 shorty

Ok, I need some help here. I'm much more familiar with passenger car Chevy engines. I know if it were a 68 car engine it would have to be a 327 because If I remeber right, they didn't make the 307 until 69. Also, is the 307 in a truck the same 307 that is in passenger cars? I also know the 327 was replaced with a 350 in 69 in cars, are trucks the same?

The 327 was offered in cars in 69 as well as the 350 and the 350 was avaiable in 67 at least in the Camaro as I have owed or worked on both. Is the 307 the same in a car or truck I don't know but I have heard rumors that some 307s would stand a 4 inch bore. I would have tryed that on my original motor(in my 72) if I would have had time as I like 3.25 stroke motors. The 350 at the time was just cheaper and faster for me.

Jim

skokie · 03-24-2005, 11:54 PM

Did you look for the casting number in the back on the drivers side?
Here is the one off of my 350 for reference.

69ChevyLB · 03-24-2005, 11:59 PM

The engine code is on a machined pad just under the right front end of the passenger side head.

TruckinDaddy · 03-25-2005, 01:02 AM

Thanks for all of the help and hints, guys. I'll be out ther bright and early, looking again.

**CPNE** · 03-25-2005, 10:26 AM

Quote:

Originally Posted by TruckinDaddy

Thanks for the good info. This is right along my line of thinking, too. So we must be right! Right?

307

TruckinDaddy · 03-27-2005, 03:31 PM

VICTORY! And right again, CPNE!

Quote:

Originally Posted by CPNE

307

With a little bit of wire brushing and a lot of gunk removed, I found the front engine pad code, V0702WA

And I got good info from http://www.nastyz28.com/sbchevy/spcodex.html WA = 1968 307 M/trans 200hp 2bbl

Thanks for all of the help guys.

hyperformance · 03-28-2005, 05:59 PM

i had a similar deal with my 67, glove box options stated 327 but after some research i found i had 307. it all looked so factory i would never have figured the motor wasn't original. also the truck vin and motor codes made me think the 307 couldn't have came from the factory.

03-24-2005, 01:48 AM	#1
TruckinDaddy What's that funky smell? Join Date: Mar 2005 Location: Austin, TX Posts: 610	307 or 327? Newbie question! I am trying to figure out what the CID is for the engine in my 68 1/2 ton, Long Step that I just got home this afternoon. I assume it has a 307 in it, since a 307 was standard for 68. Would a 327 show up on the glovebox sticker? I have been told that I need to check the stamping on the rear of the block, near the tranny. Are there other ways to confirm which engine I have, that don't require pulling the engine? I am going to be needing points/plugs and the like soon, and I want to make sure I get stuff for the correct engine. __________________ Mike S 68 C10 Long Step (Pretending to be a Long Fleetside) Grandpa's Farm Truck 3 on the tree, 307, No power brakes or steering Factory Options - HD rear spring and Ammeter/Oil Gauges My truck blog My Car Domain page

03-24-2005, 01:51 AM	#2
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,334	I would say that if the truck had a 327 from GM in it then it would say it on the sticker. I thought I saw that on a post around here not that long ago. If you get the casting number off of the back of the engine right around the bellhousing on the driver side and to go www.mortec.com that would tell you. __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

03-24-2005, 01:57 AM	#4
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,334	No problem. Post back what you have in there. __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

03-24-2005, 09:46 PM	#7
70 shorty Where's my beer? Join Date: Oct 2004 Location: Glen Allen, VA Posts: 1,768	Ok, I need some help here. I'm much more familiar with passenger car Chevy engines. I know if it were a 68 car engine it would have to be a 327 because If I remeber right, they didn't make the 307 until 69. Also, is the 307 in a truck the same 307 that is in passenger cars? I also know the 327 was replaced with a 350 in 69 in cars, are trucks the same? __________________ 70 C10, shortstep, .30 over 250,Hurst shifted 3 spd parts hauler. Holley 390, Clifford Intake, Header, ported cylinder head, unknown bigger cam. 79 Corvette L82, 4 spd, black, red interior, headers, flowmasters, and unkown bigger cam. '03 Grand Cherokee Laredo, 4.0 4x4 daily driver. 165K miles, and runs great '08 Tahoe LTZ 4x4 155K

03-24-2005, 09:56 PM	#8
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,664	You know the truck has the original engine, right? If so, and the VIN starts with CE and the glovebox does not list an engine RPO, it's a 307, that simple. Also the manual choke is a clue too. In 68, 4bbl engines (327 & 396) had auto chokes and a cool choke delete on the gauge cluster. Your carb is a 2 bbl with a manual choke, right? If so, its another clue pointing to 307. FYI, the 307 replaced the 289 in 68 as the base V8. The 350 repolaced the 327 in 69 as the optional small block. I'd like to see more pics of your truck, I've been following this with interest. Good engine for a driver IMO, but I'd still rather have an inline! __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

03-24-2005, 06:40 AM	#5
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Another option for you is to read the right front engine pad codes, (assuming the block has not been decked). If you look up the suffix code from the pad you can get the engine information from this site: http://www.nastyz28.com/spmenu.html Jim

03-24-2005, 11:12 PM	#9
sneakysnake It's a catastrophic success. Join Date: Jan 2003 Location: Oklahoma Posts: 2,077	307 replaced(283).. 289 is a F@rd.

03-24-2005, 11:54 PM	#12
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,334	Did you look for the casting number in the back on the drivers side? Here is the one off of my 350 for reference. Attached Images __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

03-24-2005, 11:59 PM	#13
69ChevyLB Active Member Join Date: Aug 2004 Location: Canton, OH Posts: 249	The engine code is on a machined pad just under the right front end of the passenger side head. __________________ 69 C10 LWB Project 47 Cushman Scooter Project It is better to have loved and lost than to live with a psycho all your life.

03-25-2005, 01:02 AM	#14
TruckinDaddy What's that funky smell? Join Date: Mar 2005 Location: Austin, TX Posts: 610	Thanks for all of the help and hints, guys. I'll be out ther bright and early, looking again. __________________ Mike S 68 C10 Long Step (Pretending to be a Long Fleetside) Grandpa's Farm Truck 3 on the tree, 307, No power brakes or steering Factory Options - HD rear spring and Ammeter/Oil Gauges My truck blog My Car Domain page

03-28-2005, 05:59 PM	#17
hyperformance Registered User Join Date: Oct 2004 Location: Knoxville, TN Posts: 47	i had a similar deal with my 67, glove box options stated 327 but after some research i found i had 307. it all looked so factory i would never have figured the motor wasn't original. also the truck vin and motor codes made me think the 307 couldn't have came from the factory.



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