Author Topic: Good donor vehicle?  (Read 219 times)

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Offline Mr onetwo

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Good donor vehicle?
« on: March 20, 2017, 09:00:15 AM »
Would a 1988 GMC 3500 4x4 be a good donor for an drivetrain upgrade for my stock 1978 RC? As far as I can tell it has a Dana 60 front and a 14 bolt GM rear.The transfer case is either a 205 or a 241c. Locally there are 20 GM's for every Dodge donor. If this is not a good year for a donor,,,what is?
1978 Ramcharger SE   440/727/203/D44/9.25

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    Offline rcb

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    Re: Good donor vehicle?
    « Reply #1 on: March 20, 2017, 12:04:43 PM »
    No. Of immediate issue is the IFS. The front differential would not be something that could be modded to fit without radical surgery. In fact most people who wheel the GMT400s do a solid axle swap. Everything else would similarly be a challenge. The 88 will use a digital speedo as well. I have a 90 k3500 and you also have to watch the gov lock posi they use. Mine has it and it's nearly useless in many situations. They also have a tendency to stop working or at worst, grenade. Personally, I think you'd be head and shoulders ahead with a mopar donor. They speak the same language so to speak.
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    Offline Mr onetwo

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    Re: Good donor vehicle?
    « Reply #2 on: March 20, 2017, 06:12:36 PM »
    Thanks for the education! What years would be acceptable?
    1978 Ramcharger SE   440/727/203/D44/9.25

    Offline rcb

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    Re: Good donor vehicle?
    « Reply #3 on: March 21, 2017, 06:45:00 AM »
    What year Mopar? If going Dodge (which I would recommend), pretty well everything from 72 to 93 is pretty straight forward, but many of the 70s trucks are full time so you may not want to mess with that. All the full time stuff is gone by 81 (maybe 80?). But pretty well everything back to 67 (I think) should be bolt in. To be honest, I think earlier may still be fine, but I know for the cars, there were motor mount changes in 65/66 but it may be that the earlier blocks will still have the same motor mount provisions as the later, just unused.

    As far as GM, everything prior to 87 and back on the trucks (except crew cabs and suburbans) and 91 and previous on Suburbans and crew cabs.
    85 Ramcharger 4bta/47rh/NP205 (work in progress)
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    Offline u2slow

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    Re: Good donor vehicle?
    « Reply #4 on: March 22, 2017, 01:01:52 AM »
    Would a 1988 GMC 3500 4x4 be a good donor for an drivetrain upgrade for my stock 1978 RC? As far as I can tell it has a Dana 60 front and a 14 bolt GM rear. The transfer case is either a 205 or a 241c. Locally there are 20 GM's for every Dodge donor. If this is not a good year for a donor,,,what is?

    If you can tell its a solid-axle truck, well, it probably is. There were still some old style 1-ton duallies (not just crewcabs) in 88-89. They may all have been cab & chassis configurations. These would have a Dana 60 with dually style hubs, 205 tcase (iron), and an extra-narrow 14-bolt. In the event its a dually pickup, it would have a wide Dana 70HD in it instead.

    A better, similar donor would be the same style SRW crewcab, or a true 1-ton SRW std cab. Still a Dana 60, 14bolt, and 205, but the axles are a better width.
    « Last Edit: March 22, 2017, 01:04:53 AM by u2slow »
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    Offline dodge82273

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    Re: Good donor vehicle?
    « Reply #5 on: March 22, 2017, 03:00:44 AM »
     a Cab Chassis 1 ton dual rear wheel will have a narrow d 70 and dual wheels as apposed to the wide pick up "dualie" axle  , with a solid d 60 front . the dodge truck serial numbers will have mm in it .... 
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    Offline rcb

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    Re: Good donor vehicle?
    « Reply #6 on: March 22, 2017, 07:37:39 AM »
    The easiest way to tell is the body style. If it's the squared 80s body style, it'll be the solid front axle. If its got the rounded 90s body style, it's IFS unless someone has done a solid axle swap.
    85 Ramcharger 4bta/47rh/NP205 (work in progress)
    79 W100 Powerwagon 318/727/NP203
    77 B300 Maxivan Coachmen Modelbee