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12-29-2021, 09:22 PM | #1 |
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Join Date: Jul 2021
Location: Crab Orchard KY
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Help with frame stamp ID
Truck is a 5/25-31 Flint built 72. It has 5-11-20 stamped on the side of the frame near the driver’s door area. The 20 is really throwing me for a loop. We’re frames built off location and that’s a plant code perhaps??
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12-30-2021, 06:03 PM | #2 |
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Location: Cheraw
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Re: Help with frame stamp ID
To the best of my knowledge there were 2 frame venders for GM. One was A.O. Smith I can remember the other one.
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12-31-2021, 02:30 AM | #3 |
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Location: Northern Nevada
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Re: Help with frame stamp ID
Pic of similar for a 1971 C10, SWB & leaf springs. I don't know what the numbers mean less the part number. For what worth most of the stamped parts on the truck are April 1971, the truck was built May 1971, Fremont. 4-23 seems to imply April 23, but 26 is the same mystery as yours.
Know what 670 on your frame means?
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
12-31-2021, 07:50 AM | #4 | |
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Re: Help with frame stamp ID
Quote:
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12-31-2021, 12:09 PM | #5 |
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Location: Cheraw
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Re: Help with frame stamp ID
Here are the #'s from my 72 frame, LH rail A41772 B005, RH rail A4672 B906. Probably adding more confusion than helping.
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01-03-2022, 11:49 PM | #6 |
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Join Date: Feb 2009
Location: Northern Nevada
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Re: Help with frame stamp ID
Just guessing the 670 in the OP is a call-out or whatever term and means for example this one is 4x4, coils and so forth. It's what makes trucks special
20 might be the factory number, for instance. I remember working for a franchise and the numbers weren't in numerical order. I wonder how many factory's built these? Figure GM pumped out approx. 9K trucks some months just Fremont alone, that's a lot of frames. I looked on the web for 70s GM frame stamp and casting, everything close just turned up this website and still empty.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
01-04-2022, 11:05 AM | #7 |
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Location: Maquoketa, Ia/ Orr, Mn
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Re: Help with frame stamp ID
This link has some better information on how to breakdown the frame stampings- given its focused on Chevelles but since AO Smith was one of the major frame suppliers the codes may carry over.
http://chevellestuff.net/qd/frames.htm
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'51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com |
01-04-2022, 12:35 PM | #8 |
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Re: Help with frame stamp ID
Went by AO Smith building in Milwaukee years ago and there were car frames stacked as high as the fence around the building.
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