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Old 10-23-2015, 08:12 PM   #26
Dieselwrencher
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Re: 72 GMC Sierra K2500 - New Project

Here's another thing to add. There were never, ever, any big block production 4wd trucks in 67-72. With the SPID saying it's a 127" wheel base leads me to believe a short bed frame has been swapped in, or some one cut it down and did a really nice job if you can't see it easily. Also, IMO your rear axle is too far back to be a SWB from the pics you've shown. That flat bed sure looks like an 8 footer to me. It looks like it has had a shackle flip in the rear too. It still looks like a great truck though. And with a 396 already added in it too boot! It looks like you have a very nice truck IMO!
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1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
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1972 C10 Suburban Custom Deluxe
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Old 10-24-2015, 10:26 AM   #27
scgmc72
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Re: 72 GMC Sierra K2500 - New Project

I'm not exactly sure where to find the frame VIN, but stamped on the frame under each door are the below numbers:

Under Driver Side Door: 3998723 262 5 26 34

Under Passenger Side Door: 3998724 262 6 9 34

Not sure why these numbers don't match, but I'm new to all of this.

Thanks for everyone's help in trying to figure out exactly what this is. I think you are probably correct on the wheel base. I haven't pulled a tape, but am betting it is the 127" LWB.
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Old 10-24-2015, 11:19 AM   #28
LockDoc
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Re: 72 GMC Sierra K2500 - New Project

Quote:
Originally Posted by scgmc72 View Post
I'm not exactly sure where to find the frame VIN, but stamped on the frame under each door are the below numbers:

Under Driver Side Door: 3998723 262 5 26 34

Under Passenger Side Door: 3998724 262 6 9 34

Not sure why these numbers don't match, but I'm new to all of this.

Thanks for everyone's help in trying to figure out exactly what this is. I think you are probably correct on the wheel base. I haven't pulled a tape, but am betting it is the 127" LWB.

As mentioned in a previous post above, the frame # would be on top of the frame by the steering box. You may have to sand or wire brush the area a little bit.

I like the truck and I wouldn't worry too much about it. I would just drive and enjoy it....

LockDoc
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Last edited by LockDoc; 10-26-2015 at 12:31 AM.
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Old 10-24-2015, 11:36 AM   #29
Ol Blue K20
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Re: 72 GMC Sierra K2500 - New Project

Being a GMC it may nt have a VIN stamped in the frame. The frame I bought for Blue is a GMC and has no VIN #
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Old 10-25-2015, 07:36 PM   #30
scgmc72
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Re: 72 GMC Sierra K2500 - New Project

Anyone know how to find out more about what this engine originally came out of?
Codes on Block are: T10I3IV 18L120797

I scrubbed & cleaned for the frame VIN. There looks like there may have been something there (very tiny), but was not legible. I'm not sure if this was it or not.
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Old 07-20-2018, 03:42 PM   #31
BlazerBill
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Re: 72 GMC Sierra K2500 - New Project

I have numbers 3998724 on the left side of frame. 72 K20
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Old 07-21-2018, 12:13 AM   #32
68350
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Re: 72 GMC Sierra K2500 - New Project

Here are possible motors it could be
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68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets
68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction
69 Chevy Camaro SS, 383, 4 speed, positraction
70 Chevy El Camino SS396, Triple Black, 454/th400, Tach
70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks
70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR
71 Chevy Blazer, CST, 350/auto
71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s
71 Custom/30, Open Road, 350/th400, tilt
72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi
72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi
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Old 07-21-2018, 08:23 PM   #33
Steeveedee
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Re: 72 GMC Sierra K2500 - New Project

OP hasn't posted in almost 3 years. I wonder what ever happened?
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