Anyone else have a 67 K25 with 10000lb GVW?

[RedRoad]

Ive loved this truck since the first day I saw it. Was described as an error and did not make it a factory 1 ton rated 4 wheel drive truck.

https://67-72chevytrucks.com/vboard/...d.php?t=657077

[RedRoad]

I posted up the images of that truck on a FB page and a 2nd 10000GVW GMC K25 showed up!!!

First VIN
KM2590V PC1920B

Second VIN
KM2590V PC191..

One a definite Timpco fire truck and the second just happens to be red as well.

Are these the only surviving 10000lb GVW factory four wheel drive GMCs in existence?

[special-K]

I love that truck, too. I don't think I've even seen one. In Maryland we can register a 3/4t up to 10,000# no matter what the factory GVW is.

The factory GVW on a single wheel 1t is under 10k#. I don't know why you had to buy a C3500 pickup with NAPCO conversion to have a 1t 4wd, that didn't have a 10,000# GVW, if you could just order a K2500 with 10,000# GVW.

We are talking GMC K2500s when we are talking 67-72. GM went to just K25 later on in the Square bodies.

[68panelman]

More pics needed, especially front axle.

[RedRoad]

Pics of the gold one are in the thread above. I guess I can repost them here to make it easier.

[RedRoad]

more pics

[68panelman]

Thanks, I went to the link. I was hoping for pics of the red one.

[RedRoad]

Clinton Bays is the owner of the 2nd 10000 GVW GMC K20. Says to have the HD front axle, and LW code Eaton rear axle. 16.5x9.75 on all four corners. Currently going under full restoration

[RedRoad]

Originally Posted by 68panelman

Thanks, I went to the link. I was hoping for pics of the red one.

The owner said he would get more pics of his truck but its currently in pieces. I will post them here as soon as they are available.

[68panelman]

Cool. Always curious with the rare oddballs, especially 4WD.
Thanks

[57taskforce]

I’ve never seen those overloads on a 67-72 4x4 before. I’ve seen similar on square bodies before but not the 67-72. Very interesting thread.

[special-K]

It's definitely got some springs. My guess is back then GM and the fire apparatus companies worked together on some special arrangements. The commercial end of COPO. Making available what ever is needed that is not offered off the production line. Same as CUCV builds. They are their own line.

I helped on a '68 Chevy Stepside C/30 NAPCO restoration that was a brush fire truck.

[StingRay]

Wow my C30 dually grain truck is only 10k gvw. As a 69 at or beyond 10K brakes are the obvious weak point. I believe they are the same front brakes as the 3/4 ton. Suspension wise at 14000 it hardly know the weight is there. Just rides nice.

[RedRoad]

Here is one more of the red one

[RedRoad]

Here are a few more of the red truck and a little history.

Originally Posted by Clinton Bays

Sadly my truck lost the spid from previous owner..it was under the seat. Mine was a tanker from P.A. then sold in 1976 to a farmer who used it as a sprayer for his field for a few years. ...then it was sold to the owner before me with no bed, and he went to restore it and ran into health problems and now I own her. . The 305 has a beautiful lower end and no ridge on the cylinder walls, but scarred terribly down the cylinders from overheating.

[special-K]

Being a '67 GMC it may haver never had a SPID. Ok, now I see him say it was under the seat, so he means build sheet. That thing was clean!

[Bob B.]

Eaton rear axle, is it an H-072? Standard rear axle for a KM 2500 is a Spicer 60, no other RPO rear axle listed. Weird duck for sure!

[special-K]

^^^ The Eaton rear went over my head. It hadn't sunken in that these are both GMCs until I looked back to check when posting about the SPID. These are cool trucks to have found. If there weren't two with the same 'different' features this would not be so fascinating. I though glitch on the VIN-plate/upfit when I saw the one first. A lot is upfit but the factory was also in on these special builds

[68panelman]

Thanks for posting more pictures. That truck does look nice and clean

[Ironangel]

The Timpco has a Dana 60 knuckle front, the red truck has the later king pin Dana 60 front. Dana's axle charts for GM only go back to 77 and according to BillaVista.com GM never used the Dana 60 front with the closed knuckle design, only the spring loaded king pin type. So now I'm really confused! I think Tim is correct in that these were COPO one off ordered trucks. The GM and Dodge Dana 60 fronts were almost identical with the differences noted in BillaVista.com http://www.billavista.com/tech/Artic...nt_Axle_Bible/

[68panelman]

Ironangel, I'm thinking it's a regular ol Dana 44 ^^
The 60 would have the inner u-bolt stud mount cast into the diff housing

[special-K]

I sure thought it was a Dana44. The first Dana60 front axles I know of were the Dodge and IH with wide 5 lug pattern. I had a late-'60s Dodge with that axle but don't recall the u-bolt configuration. By then they were 8-lug. I remember it as being king pin closed knuckle. .Could it be the first ones were done same as the Dana44 until a later point, like when Ford and GM began using them ten or so years later. Like the NAPCO front axle being an adaptation of the rear end, could the first Dana60 fronts be similarly created?

[factorystock]

My take is, yes it was probably special ordered with a 10K plate for some unknown reason, but does not have the capacity of a 10K vehicle. IMO, it is no more heavy duty than a standard production 7600k 3/4 4x4. The conventional way of getting a 10k GVW 4x4 is the Napco conversion on a 1 ton with duals, which already has a thicker frame and larger brakes. A 1 ton 4 wheel longhorn had the GVW reduced to 8800 where only the 1 ton 6 wheel got the 10k. There were reports from GM that the factory stamped incorrect GVW plates for longhorn pickups at 10K on some '68-69's.

[RedRoad]

Originally Posted by factorystock

A 1 ton 4 wheel longhorn had the GVW reduced to 8800 where only the 1 ton 6 wheel got the 10k. There were reports from GM that the factory stamped incorrect GVW plates for longhorn pickups at 10K on some '68-69's.

Ive never seen a factory longhorn 4x4 truck, didnt know they existed.

What made the 68-69 10K plate incorrect on those trucks?

[57taskforce]

Originally Posted by RedRoad

Ive never seen a factory longhorn 4x4 truck, didnt know they existed.

What made the 68-69 10K plate incorrect on those trucks?

They don’t. Only 2 frames were used on the 4x4 trucks. Short bed and long bed(Longbed is the same frame 1/2 or 3/4 ton, springs and axles are the difference between the two) in the typical 67-72 wheel base measurements. No longhorn ever left the factory as a 4x4.