The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 12-04-2017, 07:34 AM   #1
grumptruck
Registered User
 
Join Date: Dec 2016
Location: NEW PALTZ
Posts: 84
Numbers Matching

So after roughly 30 years of playing with Muscle Cars and knowing how important the correct part numbers can be in verifying the authenticity or correctness of a particular car, Im wondering how this applies to our trucks.
I own a '67 C3500 and it is very original with les than 68k miles on it.

I see numbers everywhere. On the firewall, on the hood, the engine block, the trans and rear diff etc....
While playing under the hood yesterday, cleaning etc, I noticed some numbers on the brake booster - Yellow stamp of BB and some stamped in numbers (not casting) on the master 133 1k It happens to be a 133" wheelbase 1 ton.
Do these numbers correspond or are they just random ....

I'd love to learn if there in fact a way to verify what parts are original to the truck
grumptruck is offline   Reply With Quote
Old 12-04-2017, 12:41 PM   #2
harpo231
Registered User
 
harpo231's Avatar
 
Join Date: Nov 2014
Location: Lincoln DE
Posts: 375
Re: Numbers Matching

Random ,, The spid and vin should match frame numbers and sometimes block.
If built in Canada they can send you all the info.
Attached Images
 
__________________
Stan
67 swb BLU MULE
harpo231 is offline   Reply With Quote
Old 12-04-2017, 01:42 PM   #3
Coley
Senior Member
 
Coley's Avatar
 
Join Date: Oct 2011
Location: Victoria, B.C
Posts: 2,716
Smile Re: Numbers Matching

GM didn't put the VIN numbers on the motors of the trucks until the early-mid 70's.
So the block contained a simple stamping that indicates the motor size, the transmission type, the vehicle type/size (ie: 1/2 ton, 3/4 ton) and where and when the motor was built.
However, you will not find the VIN number on that block.
The GM cars were different....the block stamping including part of the VIN.

The trucks transmission will have a similar identifier on it.

All of that said, 'matching numbers' is not really possible with these trucks...but you can do enough math on the motor to know the motor is probably original.
As a result the same level of value relative to a car's originality does not really make it into the trucks at the same level.
In other words you won't get too much of a value premium for an original motor/trans truck vs. a high quality upgrade or replacement drivetrain.

My two bits.
Coley
__________________
....for some men, there is experience, skill and effort....for the others...there is visa and UPS LOL
1966 Chevy 1/2 ton (Florida- Red/white)
1972 Chevy 1/2 ton (California- Blue/white)
2005 Chevy Silverado HD2500/Duramax
2000 Dodge Ram 1500
Coley is online now   Reply With Quote
Old 12-04-2017, 02:27 PM   #4
harpo231
Registered User
 
harpo231's Avatar
 
Join Date: Nov 2014
Location: Lincoln DE
Posts: 375
Re: Numbers Matching

what he said !
__________________
Stan
67 swb BLU MULE
harpo231 is offline   Reply With Quote
Old 12-04-2017, 03:14 PM   #5
truckster
Senior Member
 
truckster's Avatar
 
Join Date: Jan 2001
Location: Orem, Utah
Posts: 3,785
Re: Numbers Matching

Quote:
Originally Posted by Coley View Post
In other words you won't get too much of a value premium for an original motor/trans truck vs. a high quality upgrade or replacement drivetrain.
Or degrade the value by updating components.
__________________
If I didn't build it or fix it, it's probably not mine.
truckster is offline   Reply With Quote
Old 12-04-2017, 03:26 PM   #6
davepl
Registered User
 
davepl's Avatar
 
Join Date: Aug 2006
Location: Redmond, WA
Posts: 5,507
Re: Numbers Matching

If you have a date-realistic engine with the correct casting, that's as close as you can get. But consider my 1970 396 TH400 truck: the engine is coded to 1970 396 automatic truck, so it's a pretty safe bet that it's the original. But you can't prove it authoritatively, even with GM of Canada documentation.
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought
davepl is offline   Reply With Quote
Old 12-04-2017, 08:52 PM   #7
grumptruck
Registered User
 
Join Date: Dec 2016
Location: NEW PALTZ
Posts: 84
Re: Numbers Matching

Thank you all for the info. Ive learned that there is really no production date on these trucks either. Interesting that there aren't any real documents that list correct part #'s for specific model trucks.

My father owned a classic vette and man-o-man every single part was able to checked and verified. Same with my other cars.

I guess that's what in part makes these trucks so much fun. No worry of crazy rare original parts. Just put 'em to work like they were intended.
grumptruck is offline   Reply With Quote
Old 12-04-2017, 09:16 PM   #8
jocko
Senior Member
 
jocko's Avatar
 
Join Date: Oct 2009
Location: Burleson, TX
Posts: 9,127
Re: Numbers Matching

In the grand scheme of things, on these trucks - VINs can be cross-checked and verified that they represent the truck one is looking at, but engines and transmissions, etc can really only be dis-proven as original. That's not so bad, if you're not trying to fool anyone as a seller, and just like the trucks because they are your style as a buyer, then I'm glad it doesn't get too sticky over the whole numbers matching thing. Where it DOES come into consideration is when one is talking about the closest a 67-72 can get to being a blue chip original, as in a 72 swb 402 super, and things like that - when paying high dollar at BJ's one better be able to at least confirm the numbers that CAN be proven as correct all line up - and that the drivetrain at least can't be dis-proven. I think that's where the general discussion on here tends to go - disproval of originality since that is possible (and common) as opposed to proving exact originality, incl drivetrain, which is darn near impossible. Personally, I enjoy deciphering a truck's history, but it doesn't mean I don't want one that isn't "original". I have one 72 with a GM crate and one with a swapped 350 from Lord knows what. Would I rather have the known original engine - yes, if it hadn't been bored twice already, but still, I'm just fine with my run of the mill mills.
jocko is offline   Reply With Quote
Old 12-05-2017, 07:59 PM   #9
grumptruck
Registered User
 
Join Date: Dec 2016
Location: NEW PALTZ
Posts: 84
Re: Numbers Matching

I too also really enjoy the research and history associated with each truck.
I like looking over things and learning whats correct and what's not.
Im pretty sure that much of my truck is original. Its fun to expose an original marking and/ or number. Automotive Archeaology!
grumptruck is offline   Reply With Quote
Old 12-06-2017, 09:31 AM   #10
ho70
Senior Member
 
ho70's Avatar
 
Join Date: Nov 2013
Location: Winnipeg, Mb
Posts: 812
Re: Numbers Matching

Numbers matching applies to muscle cars per value as many small V8 Camaros were sold, but only a few had 396's etc. Anyone can buy a Camaro etc, but only those with money could afford a SS 396 or COPO so they are rarer hence the price increase. To find one with the original engine is rare as most were raced in the day. Our trucks I think get more money for condition and options: big blocks, ac supers etc. than a #'s matching one (which apparently doesn't exist)
ho70 is offline   Reply With Quote
Old 12-06-2017, 10:34 AM   #11
pryorstemmed
Registered User
 
pryorstemmed's Avatar
 
Join Date: Jan 2008
Location: Bridger, MT/Minot, ND
Posts: 432
Re: Numbers Matching

I saw a thread awhile back that had numbers on the protecto plate that matched a number on the engine block. You need the protecto-plate in order to know if you have the correct, "numbers matching", original engine block.
__________________
A DAY IN THE MOUNTAINS IS BETTER THAN A MONTH IN TOWN.
*1972 K10 Super SWB 4x4-Buckets/Tach/Tilt/Wood Bed/Manual Throttle/Marker Lamps
*2003 GMC Sierra K1500 Southern Comfort
*1970 Chevelle SS LS5 M22
*1978 Ford F250 Ranger-Explorer-Camper Special 4x4
Marti Report: 1 of 1
pryorstemmed is offline   Reply With Quote
Old 12-06-2017, 02:09 PM   #12
71CHEVYSHORTBED402
Senior Member
 
71CHEVYSHORTBED402's Avatar
 
Join Date: Feb 2009
Location: Northern Nevada
Posts: 3,225
Re: Numbers Matching

All kinds of stuff. Primary seems to include the door & door jam tags, SPID, build sheet, frame, title, original documentation & protect-o-plate.

Most parts have a stamp or tag of some sort, including the hardware. You can trace down to year or close. For example, if you search for the casting number on your block, the internet will provide the years the block was built. If it matches the truck, then as Chevy trucks are concerned, the numbers match.

Some parts include a part number and build date, such as an intake manifold. As I recall, every date stamp on my truck is a month before the truck was built. Gives you some idea of their inventory flow. Combined with the part number casting bumped up to GM inventories and applications, the "numbers" most definitely match.
__________________
Tony


71 C10 Custom Deluxe, SWB, fleet, 402, A/C...Resource intensive

72 Cheyenne Super, LWB, fleet, C20, 402, A/C. Driver and tinker truck
71CHEVYSHORTBED402 is offline   Reply With Quote
Old 12-06-2017, 02:16 PM   #13
GASoline71
"I ain't nobody, dork."
 
GASoline71's Avatar
 
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,120
Re: Numbers Matching

Of course ALL the Corvettes, Certain Chevelles and Camaros have value for "numbers matching" as they had specialty engine and transmissions and suspension packages available. Trucks are utilitarian in nature, and there were no specialty engine options or performance suspensions available. So, "numbers matching" to these trucks doesn't really apply to any kind of value other than sentimental value.

Having the original engine in one of these trucks that came between the frame rails from the factory is definitely cool. I have the original engine in my 1972 GMC C1500 (well... the block is original anyways)... but I would never offer it up as numbers matching and try to gain more money for it.

Gary
__________________
'cuz chicks dig scars...

My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread.

The Rebuild of Creeping Death after the wreck

Quote:
Originally Posted by LONGHAIR View Post
I would never rebuild a 305.
Quote:
Originally Posted by prostreetC-10 View Post
I love using vacuum gauges as part of the carb tuning process. I hook the gauge to the inside of my garbage can and leave it there.
Quote:
Originally Posted by Marv D View Post
Remember Murphys 2nd law of mechanical relationships... "OPPOSING COMPONENTS ATTEMPTING TO OCCUPY THE SAME SPACE, AT THE SAME TIME, GENERALLY END UP OCCUPYING ADJOINING SPACE AT THE BOTTOM OF THE OIL PAN"
GASoline71 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:32 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 1997-2013 67-72chevytrucks.com