Will a 1/2ton cab fit a 3/4ton chassis - The 1947 - Present Chevrolet & GMC Truck Message Board Network

O1Sparky · 07-28-2018, 08:39 PM

I am building a 1980 3/4t truck into a serious towing rig. The existing cab is toast, so I picked up another cab (a 76 1/2t) and had it repaired. I am to the point of ordering the cab to frame hardware, I discovered that theres 2 separate kits, 1 for the 1/2t and 1 for the 3/4t, are there any modifications that have to be made for this installation? Or are they a close enough match to fit together?

sweetk30 · 07-28-2018, 08:53 PM

cab dont care frame size in 1/2-1ton . other than floor hump for trans . in your old vintage you can prob just unbolt the floor hump and swap it with the other as needed .

i have or had 2wd cabs on 1ton fwd frames from 73-80 to 81-87 and or other mix and matches . no problems.

if you need body bushings kit and hardware just order for the FRAME year / model .

like the old color design on that truck hope you going old school on the repaint.

Bandit130 · 07-28-2018, 09:14 PM

**Getter-Done** · 07-29-2018, 09:31 AM

Welcome.
Cab will fit no problem.
The biggest difference from your 1980 frame and your 1976 cab is the hood hinges and front frame horns.
All that can be overcome with no issues.

sweetk30 · 07-29-2018, 12:31 PM

Quote:

Originally Posted by Getter-Done

Welcome.
Cab will fit no problem.
The biggest difference from your 1980 frame and your 1976 cab is the hood hinges and front frame horns.
All that can be overcome with no issues.

what ? its 73-80 then 81-up for the split .

**Getter-Done** · 07-29-2018, 01:20 PM

Quote:

Originally Posted by sweetk30

what ? its 73-80 then 81-up for the split .

Sorry 01 Sparky
Sweetk30 is right 80/81 is the swap over on the hinge and front bumper stuff.

I have an 81 for parts truck . I thought it was an 80 but just checked it is an 81. My Bad.

O1Sparky · 07-30-2018, 04:56 PM

Thanks guys,
Another stupid question, why is there more parts in the 3/4t kit? I thought it was because there were more bolts? Is there more clearance between the cab and frame?

sweetk30 · 07-30-2018, 08:09 PM

I cant help there as I use 81-87 frames my self . there all the same basicly . I do know 73-80 had some combo's of body bushings tho.

07-28-2018, 08:39 PM	#1
O1Sparky Registered User Join Date: Jul 2018 Location: Lynnwood washington Posts: 2	Will a 1/2ton cab fit a 3/4ton chassis I am building a 1980 3/4t truck into a serious towing rig. The existing cab is toast, so I picked up another cab (a 76 1/2t) and had it repaired. I am to the point of ordering the cab to frame hardware, I discovered that theres 2 separate kits, 1 for the 1/2t and 1 for the 3/4t, are there any modifications that have to be made for this installation? Or are they a close enough match to fit together? Attached Images

07-28-2018, 08:53 PM	#2
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: Will a 1/2ton cab fit a 3/4ton chassis cab dont care frame size in 1/2-1ton . other than floor hump for trans . in your old vintage you can prob just unbolt the floor hump and swap it with the other as needed . i have or had 2wd cabs on 1ton fwd frames from 73-80 to 81-87 and or other mix and matches . no problems. if you need body bushings kit and hardware just order for the FRAME year / model . like the old color design on that truck hope you going old school on the repaint. __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.

07-28-2018, 09:14 PM	#3
Bandit130 Registered User Join Date: Dec 2014 Location: Euless, Texas Posts: 520	Re: Will a 1/2ton cab fit a 3/4ton chassis __________________ 1974 Cheyenne 10 LWB Stock 350 W/HEI /TH350/AC/4 BBL Quadrajet Mopar by Birth Chevy by Choice

07-29-2018, 09:31 AM	#4
Getter-Done Senior Member Join Date: Dec 2009 Location: TN. Posts: 8,442	Re: Will a 1/2ton cab fit a 3/4ton chassis Welcome. Cab will fit no problem. The biggest difference from your 1980 frame and your 1976 cab is the hood hinges and front frame horns. All that can be overcome with no issues. __________________ ________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build

07-30-2018, 04:56 PM	#7
O1Sparky Registered User Join Date: Jul 2018 Location: Lynnwood washington Posts: 2	Re: Will a 1/2ton cab fit a 3/4ton chassis Thanks guys, Another stupid question, why is there more parts in the 3/4t kit? I thought it was because there were more bolts? Is there more clearance between the cab and frame?

07-30-2018, 08:09 PM	#8
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: Will a 1/2ton cab fit a 3/4ton chassis I cant help there as I use 81-87 frames my self . there all the same basicly . I do know 73-80 had some combo's of body bushings tho. __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.



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