are c10 and k10 cab mounts the same?

[sir_talk_alot]

just out of curiousity here, are c10s and k10s and k20/c20s all the same cab mounts? and what years all bolt up if so. the threads ive found are people converting their frames to accept a pumpkin. id imagine they are. just curious in the case that i found a k10 swb frame....

[SHANE 73Z]

From memory, the C10 is unique.

All 4 mounting pucks under the cab are the same. Id estimate they are 1" to 1 1/4" tall.

All K-trucks and C20 & up have a shorter frame bracket (compared to the top of framerail height) than the C10. Therefore the rear pucks are approximately 3" tall.

There is also a difference in the core support mounts. 67-8 are different then 69-up.

Shane

[special-K]

Yep,the C/10s are all by themselves and shorter. Core support mounts vary from 67/68 to 69-72,but don't vary between 10-30 series

[sir_talk_alot]

Ok so i guess i couldnt swap a c10 cab over to a k10 frame
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[ddubbs]

Yes you can swap the cab from a c10 to a k10. The difference is that you would need to get the cab mount bushings for a 4wd versus the cab mount bushings for a 2wd. Hope this helps you.
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[SHANE 73Z]

Originally Posted by ddubbs

Yes you can swap the cab from a c10 to a k10. The difference is that you would need to get the cab mount bushings for a 4wd versus the cab mount bushings for a 2wd. Hope this helps you.
Posted via Mobile Device

Agreed, all cabs are the same. The difference is in the frame, buy bushings for the frame.

Shane

[special-K]

Originally Posted by sir_talk_alot

Ok so i guess i couldnt swap a c10 cab over to a k10 frame
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Yes,but it's best to use one from a 4spd or big block w/high hump floor. since that's required on a K-model. You can graft the area from the old cab or cut it from a junker. That area is always in good condition.

[sir_talk_alot]

oh cool. well if i come across a good frame i may snatch it up and go back to the country boy that i am with a 4x4

[Jahloha]

Highjacking this thread slightly.

Would it be possible to put a C20 body onto a K20 frame? A 1970 body onto a 70-72 K20 frame.

Just a curiosity I have.

[special-K]

Yep. Cabs is cabs. They all mount the same. 4wds have a high transmission hump that is removeable. So do big block 2wds and 4spd 2wds. Those can be fitted to a low hump floor. The outline is stamped into the floor

[Jahloha]

Thanks Special K for the response. I both trust and value your knowledge.

Follow up questions, if I may:

1. Assuming beds can be swapped too?
2. Would the C20 cab on a K20 frame/drivetrain produce any other issues outside the hump (which I was aware of)? For example, steering column, etc.

[Richard]

From what I have seen the K series has a different lower core support mount. More like a puck (like the upper) than the cone that the C series uses. The cone style still fits though.

[Jahloha]

Hypothetically could one remove the cab and bed from a K20 and replace with a C20 cab and bed?

Im assuming the K20 front clip would align properly to newly place C20 cab.

And for anyone who reads this, I'm asking because I'm considering buying a K20, but putting my C20 cab/bed on.

[gmc684x4]

The only sheet metal difference is high hump low hump in the cab gm even gives you the nice line to cut out a lot hump for installing high hump pan

Many people have went this route i did it to my 68 c10 to k10 like 30 years ago there is a guy in the build threads look up his c10 to k20 thread

The cab rubber mounts are different from c10 to c20 c20 are the same cab mounts as the k trucks

67 68 trucks had a different rad support mount then the newer frames which you can cut down to fit

[Jahloha]

So could I in confidence do all the body work on my C20 before finding a K20 donor chassis without concerns of having to rip into sheet metal again later in the process?

Please forgive that run-on sentence.