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Old 12-19-2014, 08:45 AM   #1
biohazardbill
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66 gmc 4000

So I have picked up a 66 GMC 4000. Long story short I am actually wanting to convert this to a more modern drivetrain to be able to use it as a car hauler for long distances and feel safe in doing so. Plan is to make it a ramp truck, not a rollback and possibly pull a trailer. I see 1 ton duallys all the time lately pulling ramp trailers with 3 cars ect so I figured using a 1 ton rear axle and maybe front end components would be the way to go. Thoughts?
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Old 12-19-2014, 09:15 AM   #2
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Re: 66 gmc 4000







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Old 12-19-2014, 09:17 AM   #3
68panelman
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Re: 66 gmc 4000

Just remember the wheel openings are larger for the 20'' rims these trucks came with, most 1 ton rears are 8 lug and will only offer you smaller wheel choices. I would look into the GM 3500HD axles, you get disc brakes, 19.5 wheels, and will accept the 5/10 lug 20" wheels you already have.
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Old 12-19-2014, 10:08 AM   #4
C10 - C90 Bill
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Re: 66 gmc 4000

Nice truck.

Like the nice sheet metal.

If the "GMC" letters are original to the truck, it is not a '66, but a '64 or '65.

Can't help much on the modifications. If it were mine, I would be keeping it original, but either change the Rear Gears or possibly swap it to a more hiway-friendly 2-Ton Rear.

Or, check into a Brown-Lipe Aux Trans with an Overdrive.

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Old 12-19-2014, 11:36 AM   #5
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Re: 66 gmc 4000

I actually thought the same thing but was unsure if the same applied to the big trucks when it came to the GMC lettering.

I doubt it will stay original drivetrain wise. The main reason I picked it up because I have always thought about having a ramp truck of the same time period as my suburban. I really wasn't ready for this yet but for the price I could not pass it up.
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Old 12-19-2014, 07:54 PM   #6
mrolds88
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Re: 66 gmc 4000

You could find a late model C4500 or C5500 and pull the drivetrain. Might get lucky and find a Duramax truck!!
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Old 12-19-2014, 09:34 PM   #7
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Re: 66 gmc 4000

I see the perfect donor in the background. Gotta go medium duty in my book. Maybe you can buy a 1t and haul like that, but if you're going to build it, build it right. Just put the cab on the newer frame
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