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Old 10-04-2022, 08:17 PM   #1
burnem
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Frame swap 64 2wd C20 long bed to a 71 C20 frame

what are the problems in mounting a 64 GMC cab, nose, and 8' bed onto a 71 or 72 Chevy frame? or is it easier to add front disc brakes and power steering to the 64 frame? all opiniones appreciated, thanks
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Old 10-04-2022, 08:30 PM   #2
karlbenz
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Re: Frame swap 64 2wd C20 long bed to a 71 C20 frame

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Originally Posted by burnem View Post
what are the problems in mounting a 64 GMC cab, nose, and 8' bed onto a 71 or 72 Chevy frame? or is it easier to add front disc brakes and power steering to the 64 frame? all opiniones appreciated, thanks
I would never frame swap for disc brakes. Lots of info on here about it
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Old 10-04-2022, 09:59 PM   #3
AcampoDave
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Re: Frame swap 64 2wd C20 long bed to a 71 C20 frame

Swapping disc and power steering are pretty straight forward on the earlier frame. I know some GMC trucks had rear leaf springs and I could see that being one factor for swapping the frame, but aside from that it would be easier to swap the front crossmember and get a power steering adapter such as those made by Captian Fab. If you have a donor lined up your already on your way. Don't overlook the rear end too because the donor may possibly have a more favorable gear ratio.
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Old 10-04-2022, 10:20 PM   #4
Warrens69GMC
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Re: Frame swap 64 2wd C20 long bed to a 71 C20 frame

I had considered getting a 64-66, so I have a complete rolling c20 chassis from 1976.
Still haven't got my 64-66 though.
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Old 10-04-2022, 11:27 PM   #5
cwcarpenter98
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Re: Frame swap 64 2wd C20 long bed to a 71 C20 frame

Definitely easier to swap over the front suspension since the front crossmember is almost a bolt in with just drilling a couple holes. The cab on the later frame requires modifying the cab mounts and you run into issues with the front bumper and frame horns not matching up correctly
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Old 10-05-2022, 09:11 AM   #6
SCOTI
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Re: Frame swap 64 2wd C20 long bed to a 71 C20 frame

Front frame horns are shaped different so changes are required depending on bumper used.
Front radiator core support mounts are in a different location.
Rear cab mounts are in a different location.

Definitely easier to swap disc brakes & power steering over to a '64 chassis.
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