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70-72 vs. 73 & up

Discussion in 'Chevy Trucks' started by Rick Loncosky, Aug 27, 2004.

  1. Rick Loncosky

    Rick Loncosky Senior Member
    from 17557
    Messages: 102

    I just bought a 70-72 3/4 ton 4x4 rolling chassis w/ cab. It looks like the rear brake drums and axles ? are the same but I didn't take it apart yet. I see the center section is like the 9" ford. Does anyone know for sure if the drums & hubs & ax els will fit 73 & up? It has the large lock-out hubs up front like my 77 K20. Which is why I jumped on this deal for $100. Also it came with a 4 speed & x-fer case that are the same. I was wondering about the brake booster, will it interchange? It looks like the brackets drop down and the rod has a pivot to be in the center. Any other vintage tin specialists out there that can help. Thanks, Rick..........
     
  2. derekbroerse

    derekbroerse 2000 Club Member
    Messages: 2,377

    That is an odd duck you have there. Tranny and transfer case are identical. Brake booster you should sell on ebay as most of the '67-72 trucks it fits have manual brakes. I doubt it will fit the newer trucks.

    The front axle SHOULD be a Dana 44. Clean it up with a wire brush around the diff. cover.... on the cast iron webs in the corners are usually numbers, one of them I would bet should say "44". The leaf spring perches if I'm not mistaken are in a different location on these trucks.

    The rear axle doesn't sound like it belongs. Some photos would help with this. GM products didn't use a drop-out center section like a Ford since '64. My friend's '72 GMC 3/4 2wd had a 14 bolt rear end and my '69 1/2 used the 12 bolt truck axle. I honestly don't know if they use the same internals or not (axle length needs to be measured).

    My advice is to list this chassis on Ebay as you will make a very easy profit on it, even if you keep the tranny/transfercase setup and get only your $100 back it would be like getting those for free. The '73-87 parts are very common and easy to get, why butcher up the rare vintage stuff to fit on the newer more common stuff? I think you would sell it very easily and could use the proceeds to buy a parts truck that is more applicable. :nod: For the price, it was a good buy even as an investment.
     
  3. Rick Loncosky

    Rick Loncosky Senior Member
    from 17557
    Messages: 102

    Thanks for your responce Derek. Did I mention it also has a tilt wheel. I would like to sell a few things on E-bay, now I have some motivation. I'm attaching a picture of the rear. I remember those early chevy rears. Nice to set up on the work bench instead of under the car. I need to pull a back wheel off to see if it has removeable axles. the rims have dust covers. If you know anybody interested in parts off this critter send them this way. Rick.
     

    Attached Files:

  4. derekbroerse

    derekbroerse 2000 Club Member
    Messages: 2,377

    Tilt wheel is worth several hundred (usually)on Ebay alone!!! Good score!
    I don't recognize that axle at all. Does it look original, no signs of being cut and welded bracketwise?

    Are you sure of the vintage of the truck, and that it also isn't a cab on an older chassis (ie modified mounts)?

    Hmmmm....
     
  5. Rick Loncosky

    Rick Loncosky Senior Member
    from 17557
    Messages: 102

    I found out that there is a back cover on this beast. It is a typical #5200 - #7200 GVW rear. It has a bolt/nut beside the pinion for some sort of adjustment. It also is 1" narrower than my 14 bolt full floater. U-bolts are upside down compared to mid 70's too.