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1970 C-50 Chevy

Discussion in 'Chevy Trucks' started by T. Matthews, May 16, 2003.

  1. T. Matthews

    T. Matthews Junior Member
    Messages: 17

    Hey Everyone,

    Does anyone anything about a 1970 C- 50 model Chevy dump. it is a 24000gvw truck with a straight 6 engine. 2 speed rear end. I'm looking at buyin one, but want to know more about them such as parts, electronic shifting rear ends as compared to air assisted. Any help would be much appreciated .
  2. Chuck Smith

    Chuck Smith 2000 Club Member
    from NJ
    Messages: 2,317

    The cab is the same as that used on pickups of the same vintage. The truck will have drum brakes up front. I believe the brakes are assisted by the power steering pump too. The motor will be very simple to work on. It most likely does not have electronic ignition unless someone installed it, though that could be installed easily and cheap too. The fuel mileage will suck. I am not sure how plentiful replacement brake drums are, and if you run the truck in the salty winters, you can end up needing to work on the brakes often. I know people with similar trucks, who don't run them in the winter because of the cost of brake repairs.

    I don't know much more about them, so that is my $0.02

  3. Alan

    Alan PlowSite.com Addict
    Messages: 1,393

    here's some straight poop

    I've got a 71 GMC 5500, same animal, different logo. If you have the same equipment as mine this is what you'll find in there.

    The engine is a 292 cubic inch. Makes good torque, but not a speed demon by any stretch.

    You're probably running 8.25x20 rubber, which is getting hard to find. That used to be a standard size on that style truck.

    With your 24,000 GVW you may have 9.00x20 though, a bit easier to come by. Are you on disc wheels or spoke type?

    Mine has drum brakes all around, no discs in that era. Brake boost is by a Hydro-Vac booster located under the drivers side of the cab, outside of the frame. Brakes are (on mine) Wagner dual servo (two slave cylinders per wheel) on the rear and single servo up front. Self abjusting on all four corners.

    The rear is vacuum shift, not air. the only way to get electric shift is to change rears. Parts for vacuum units are now made of unobtainium, so if you break it you will be swapping rears. As far as function, the vacuum unit works about as good as an electric, although it is a bit more prone to hanging between gears if you bungle the shift, particularly if you're splitting down, very rare to hang it shifting upwards.

    Load capacities are generally under rated for these trucks. While mine GVWs for 19,500 it is regularly loaded to 22K+ and seems to handle it just fine.

    Power steering is rare in that vintage, regardless of brand. Back then real men drove trucks, boi th jizzus, and they had arms like Schwarzenegger (sp). Someday I'm going to adapt some sort of power steering to the 5500, I'm too damn old to wrestle it.

  4. snow

    snow PlowSite.com Veteran
    Messages: 1,002

    Hey Alan-

    Any new photos of the old GMC 5500? I know you put central hydraulics and a spreader on it a while ago. Any photos of that setup? Are you using the 5500 anymore since you work for the builder or is it mainly a spreader truck now?

  5. T. Matthews

    T. Matthews Junior Member
    Messages: 17

    hey ,

    The vacum assited brakes are no longer they put in a master cylinder. The split rear end is now in low gear because it ran off teh vacum is it alright to run it like that as long as i don't take it on the highway? This truck aslo has power steering
  6. Alan

    Alan PlowSite.com Addict
    Messages: 1,393

    If they are hydraulic brakes they ALL have a master cylinder. Does this one have a big booster can on the firewall behind the master cylinder? If it does then it has been converted from the hydrovac. If it has just a small master with one line coming off it, and you can stop it without a Fred Flintstone act, then it most likely has the booster still located under the drivers floorboard. I don't think I've ever seen one of that age and size that was not equipped with boosted brakes.

    As for the vacuum rear, it could be stuck for a number of reasons. Is there any skip in the engine? If there is I'd bet you have a rusted through vacuum line going to the rear. All the parts, other than the lines, which are just generic tubing, are currently only made by the Unobtainium Co. so you're into junkyarding for anything you need to operate that axle.

    You won't hurt anything driving it in low range but you'll test your patience. Low range might be something on the line of 8.8 to 1.

    With that high GVW you probably have a wider front track than mine does and more fender flare to cover the tires. There were several variations in the front sheet metal to accomodate different combinations of components. The cab shell itself is virtually identical to the pickups of the same years, with the exception of the lower front corners of the doors and door frames. The pickup doors are square cornered while the big trucks have a concave radius there to accomodate the trucks fenders.

    The power steering is probably the type with an external slave cylinder attached between the axle beam and the tie rod?
    Last edited: May 18, 2003
  7. T. Matthews

    T. Matthews Junior Member
    Messages: 17

    HElP I need Fender for this truck

    Does anyone have front fenders fro this truck. I need them ASAP.


    Tom Matthews
  8. Chevytruck85

    Chevytruck85 Senior Member
    Messages: 228

    I have a 1973 C-60 350 gas 2 speed rear end love the thing pulls a 10 ton excavator just fine.
  9. T. Matthews

    T. Matthews Junior Member
    Messages: 17

    Anybody? Front fenders? I need them ASAP. Does anyone know where I can get them? I 've tried hemmings all the local junk yards driven all over Maine and NH.

    Please help,


  10. Chevytruck85

    Chevytruck85 Senior Member
    Messages: 228

    Iv looked for fenders too, hard to find, ended up patching the old ones.
  11. T. Matthews

    T. Matthews Junior Member
    Messages: 17

    My fenders are past repair. I think there is now more bondo than metal.
  12. derekbroerse

    derekbroerse 2000 Club Member
    Messages: 2,377

    Nothing is past repair if you can't find replacements. You'd be surprised what someone creative with a torch could make them look like in a pinch.

    You will need to make a few phonecalls, either to truck wreckers down south, or to people who specialize in searching out rustfree fenders and doors. Either way, better be prepared to pay a good buck for the right pieces... once they figure out that you need them that badly and they aren't all that common anymore they will rape you for them.

    Or you can pack up the wife and kids and take a vacation in, say, Arizona, or Texas. Should still be lots of them down there.

    There's always ebay, though you may have to buy a whole truck :D

    Good luck...
  13. ratlover

    ratlover PlowSite.com Addict
    from IL
    Messages: 1,325

    never mind, wrong body style
  14. T. Matthews

    T. Matthews Junior Member
    Messages: 17

    1970 C50 fenders

    Still looking for 1970 c50 fenders. Anyone?
  15. derekbroerse

    derekbroerse 2000 Club Member
    Messages: 2,377

    Found a whole truck for sale near my house, $600

    Fenders have some rust and bondo but look presentable, and with a little care with more filler and fresh paint would probably look great for a long time. I guess it depends on how bad yours are.

    I took pix if you'd care to see them. Maybe we can work something out to get the truck cheap enough and ship the fenders?
  16. derekbroerse

    derekbroerse 2000 Club Member
    Messages: 2,377

    Here are a few pix...
    Last edited: Dec 23, 2006
  17. T. Matthews

    T. Matthews Junior Member
    Messages: 17

    So how much to take off and ship?
  18. derekbroerse

    derekbroerse 2000 Club Member
    Messages: 2,377

    Sending you a PM...
  19. T. Matthews

    T. Matthews Junior Member
    Messages: 17

    Antique 1970 C-50 Chevy 41,000 original miles. New:new tires, body work, new fender, paint, white oak & hickory wood sides, new clutch, new belts and hoses, thermostat, electronic ignition no more points, valve cover gasket exhaust manifold gasket, new PTO cables, new window, belts & hoses,leaf box, battery, spare hood, spare fender flare, spare rebuilt engine, optional leaf vacuum 17500 B/o 2100 for leaf vaccum
  20. davefromsalem

    davefromsalem Junior Member
    Messages: 1

    need parts

    i just bought a 1970 c50 and need exhaust and intake manifolds.....new. any suggestions?