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#1209130 - Sat Mar 18 2017 08:52 AM Frame swap chevy 63 Long 2wd to GMC 65 long 4x4
vanhow10 Offline
Moderated
Registered: Wed Mar 02 2016 05:29 PM
Posts: 1
Loc: ok
My GMC long frame on a 65 4x4 needs excessive repairs due to major rust out. I have access to a 63 Chevy 2wd long frame. Are the frames the same other than the suspensions and of course the axle? I'm hoping to be able to transfer the 4x4 axles to the donor frame.
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#1209213 - Sat Mar 18 2017 06:56 PM Re: Frame swap chevy 63 Long 2wd to GMC 65 long 4x4 [Re: vanhow10]
Hambone Offline
Registered: Mon May 21 2007 12:00 PM
Posts: 1003
Loc: california, md
Welcome to the site. I think the Moderator will move this to the 60-66 forum where you might have more response. I know someone there will have your answer.
HB
_________________________
HB

1966 Chevrolet K-10
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#1209229 - Sat Mar 18 2017 09:15 PM Re: Frame swap chevy 63 Long 2wd to GMC 65 long 4x4 [Re: vanhow10]
bartamos Offline
Shop Shark
Registered: Thu May 26 2005 12:00 PM
Posts: 4918
Loc: The Ranch
If you have a GMC Truck, the motor/mounts are for a V6 or I6. The GMC frame is different than a Chevy and the 2WD is different than a 4X4.

If I read your post correctly, you have a 65 GMC 4X4 and have access to a 63 Chevy 2WD, so examine the differences. Anything is possible and it's all been done by somebody. All you need is a tape measure, a plan, a welder, some fab skills and time. It would be a miracle if someone here knows the exact differences between those two trucks.

Check 4X4 frame channel is deeper/stronger, frame horns/mounting features different for bumpers/radiator/grille, Some GMC's are longer for long motor, motor and tranny mounts different (depending on what motor and trans we are talking), body mounts, coil front/trailing arm rear on 2WD, all leaf on 4X4, Xfer case mounting features, shock mounts, Hydraulic clutch vs. mechanical, and etc.

As you can see, you have:
1. Year differences.
2. GMC/Chevy differences.
3. 2WD/4WD differences
all at once.

Possible bag of worms, fab nightmare and Frankentruck looks. A lot does depend on your skills or your money.
Bottom line: Not even close to a "bolt on" swap.
_________________________
1960 GMC K10 Shortbed Wideside BBW CC BBV6 (The Oreo SpeedWagon)
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#1209262 - Sun Mar 19 2017 01:23 AM Re: Frame swap chevy 63 Long 2wd to GMC 65 long 4x4 [Re: bartamos]
padresag Offline
Shop Shark
Registered: Wed Mar 04 2009 08:07 PM
Posts: 787
Loc: Sidney, B.C., Canada
Originally Posted By bartamos
If you have a GMC Truck, the motor/mounts are for a V6 or I6. The GMC frame is different than a Chevy and the 2WD is different than a 4X4.

If I read your post correctly, you have a 65 GMC 4X4 and have access to a 63 Chevy 2WD, so examine the differences. Anything is possible and it's all been done by somebody. All you need is a tape measure, a plan, a welder, some fab skills and time. It would be a miracle if someone here knows the exact differences between those two trucks.

Check 4X4 frame channel is deeper/stronger, frame horns/mounting features different for bumpers/radiator/grille, Some GMC's are longer for long motor, motor and tranny mounts different (depending on what motor and trans we are talking), body mounts, coil front/trailing arm rear on 2WD, all leaf on 4X4, Xfer case mounting features, shock mounts, Hydraulic clutch vs. mechanical, and etc.

As you can see, you have:
1. Year differences.
2. GMC/Chevy differences.
3. 2WD/4WD differences
all at once.

Possible bag of worms, fab nightmare and Frankentruck looks. A lot does depend on your skills or your money.
Bottom line: Not even close to a "bolt on" swap.


why would it be a miracle?
there are quite a few conversions done. though not many well. the frame is 2" deeper on a 4 x 4 but only pretty well on ths section that runs under the cab and back to where it raises up. frame horns and mounting features are the same for bumpers/ radiator and grille. some GMcs are not longer for long motor. the 60/62 has different items as you say but a 63 frame is similiar to a 65. It was mentioned to him on another forum that if he wants to pursue it that he should look for a GMC frame from 63/6 as they come with semi elliptics in the back. he would have insatll mounting for t/case and such
ron
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#1209263 - Sun Mar 19 2017 01:28 AM Re: Frame swap chevy 63 Long 2wd to GMC 65 long 4x4 [Re: vanhow10]
padresag Offline
Shop Shark
Registered: Wed Mar 04 2009 08:07 PM
Posts: 787
Loc: Sidney, B.C., Canada
1960-66 frame dimensions
Frame dimensions are as follows:
1963-66

½ ton 2WD: 6-1/32 x 2-1/2 x 5/32

¾ ton 2WD: 6-1/8 x 2-17/32 x 3/16

One ton 2WD: 8-1/8 x 2-13/16 x 3/16

½ ton 4WD 115” WB: 8-1/32 x 2-25/32 x 9/64

½ ton 4WD 127” WB: 8-1/8 x 2-13/16 x 3/16

¾ ton 4WD: 8-1/8 x 2-13/16 x 3/16

As you can see, even the ½ ton 4WD long bed uses the same size frame member
as the one ton 2WD.


1960-62 frame ,measurements

½ ton 2WD: 5-15/32 x 2-1/4 x 1/8
¾ ton 2WD: 7-3/16 x 2-3/4 x 3/16
½ and ¾ ton 4WD: 7-13/64 x 2-3/4 x 3/16


I think that these measurements should be stored somewhere

ron
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#1209298 - Sun Mar 19 2017 09:57 AM Re: Frame swap chevy 63 Long 2wd to GMC 65 long 4x4 [Re: vanhow10]
Paul_WNC Online
Shop Shark
Registered: Sun Nov 27 2011 10:09 AM
Posts: 1305
Loc: North Carolina
I thought the 2wd versions in that era had torsion bar front suspension and coil spring rear...at least on 1/2 ton models? All leaf springs for the 4wd.


Edited by Paul_WNC (Sun Mar 19 2017 09:58 AM)
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#1209304 - Sun Mar 19 2017 10:19 AM Re: Frame swap chevy 63 Long 2wd to GMC 65 long 4x4 [Re: Paul_WNC]
padresag Offline
Shop Shark
Registered: Wed Mar 04 2009 08:07 PM
Posts: 787
Loc: Sidney, B.C., Canada
60-62 had torsion bars. 63-66 GMC had semi elliptic springs on the rear. chev did not.
he is talking about converting tha 2 wd over to 4 x 4. this link is one of the better conversions around
http://67-72chevytrucks.com/vboard/showthread.php?t=448681
ron


Edited by padresag (Sun Mar 19 2017 10:20 AM)
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