1. SDJunkMan

    SDJunkMan Full Access Member

    Age:
    60
    Posts:
    504
    Likes Received:
    267
    Joined:
    Nov 17, 2017
    Location:
    Black Hills of South Dakota
    First Name:
    Jeff
    Truck Year:
    1978
    Truck Model:
    K10
    Engine Size:
    350
    Not a build thread, but not sure where to put this. Just picked up a 82 GMC 2500 as a parts truck for my 80 K20. I plan to use the bed, since it's better than mine, as well as the 16" wheels (mine has 16.5's). It has power windows, which I may also use, as well as a tilt wheel, quartz clock, and rear cab corner speakers that I will hang on to.

    It is a 6.2 biesel, and I am guessing it was running when parked (not sure how they would've got the trailer there if it wasn't). Been parked since about 2009. Is there any market for a used 6.2? Should I try to get it running? It seems like most diesel squarebodies end up with a gas engine when the diesel crapps out.

    I hope to sell what I can't use for my trucks, and scrap the rest. I may hang on to the tranny as a core for a future project (700R4?), and any small parts worth saving, but I don't have room for another complete truck.

    image.jpeg

    image.jpeg

    image.jpeg
     
  2. SDJunkMan

    SDJunkMan Full Access Member

    Age:
    60
    Posts:
    504
    Likes Received:
    267
    Joined:
    Nov 17, 2017
    Location:
    Black Hills of South Dakota
    First Name:
    Jeff
    Truck Year:
    1978
    Truck Model:
    K10
    Engine Size:
    350
    It also has hydroboost brakes whch I will probably keep. It has variable speed wipers, is that just the control, or is the wiper motor different. Will a 82 wiper motor fit on a 78 cab ( if the motor is different)?

    image.jpeg
     
  3. HotRodPC

    HotRodPC Administrator Staff Member

    Posts:
    42,167
    Likes Received:
    1,932
    Joined:
    Aug 29, 2010
    Location:
    OKC, OK
    First Name:
    HotRod
    Truck Year:
    85
    Truck Model:
    Silverado K10 to K20 Conversion
    Engine Size:
    6.2 to Gas???
    That 700r4 is the junkiest of the junk if it's an 82 model. Small spline input shafts and all. The 82-84 are the worse ever. Unless you're wanting one to disect I don't know of much in it to make it even worth saving as far as pump, case, drums etc. Seems the valve body may have been able to be used for something else and now I can't remember what that was but if it was it would only be good on up to an 86 model with mods. 87 up used the seconday valve body making the primary valve body different also.

    It does appear you have some other good parts though. :waytogo: It even has bumper thingies.
     
  4. HotRodPC

    HotRodPC Administrator Staff Member

    Posts:
    42,167
    Likes Received:
    1,932
    Joined:
    Aug 29, 2010
    Location:
    OKC, OK
    First Name:
    HotRod
    Truck Year:
    85
    Truck Model:
    Silverado K10 to K20 Conversion
    Engine Size:
    6.2 to Gas???
    Save that oil pressure gauge too. They are 80lb gauges instead of 60lb in the 6.2 trucks. Also the seconday battery tray so you can run an isolater and dual batteries on your gas truck. Great to have on a 4x4 where you may be running an air compressor, light bars, winches and other accessories, charging phones and such out in the fields.
     
    Snoots likes this.
  5. HotRodPC

    HotRodPC Administrator Staff Member

    Posts:
    42,167
    Likes Received:
    1,932
    Joined:
    Aug 29, 2010
    Location:
    OKC, OK
    First Name:
    HotRod
    Truck Year:
    85
    Truck Model:
    Silverado K10 to K20 Conversion
    Engine Size:
    6.2 to Gas???
    I am pretty sure there is also a module that goes along with that switch, @RetroC10Sport can confirm that for you and tell you where it's at and what it looks like.
     
  6. HotRodPC

    HotRodPC Administrator Staff Member

    Posts:
    42,167
    Likes Received:
    1,932
    Joined:
    Aug 29, 2010
    Location:
    OKC, OK
    First Name:
    HotRod
    Truck Year:
    85
    Truck Model:
    Silverado K10 to K20 Conversion
    Engine Size:
    6.2 to Gas???
    BTW, did a C20 come with a 700r4??? I figured that would be a Th400.
     
  7. SDJunkMan

    SDJunkMan Full Access Member

    Age:
    60
    Posts:
    504
    Likes Received:
    267
    Joined:
    Nov 17, 2017
    Location:
    Black Hills of South Dakota
    First Name:
    Jeff
    Truck Year:
    1978
    Truck Model:
    K10
    Engine Size:
    350
    I guess I won't bother with the tranny then. I have a TH400 that I have been hanging on to, just thought a 4th gear would be nice. The bumper thingies are nice, but won't fit with the snow plow frame on the K20. I am sure I can find someone that can use them.
     
  8. SDJunkMan

    SDJunkMan Full Access Member

    Age:
    60
    Posts:
    504
    Likes Received:
    267
    Joined:
    Nov 17, 2017
    Location:
    Black Hills of South Dakota
    First Name:
    Jeff
    Truck Year:
    1978
    Truck Model:
    K10
    Engine Size:
    350
    It was ordered that way I think. RPO code MXO from the sheet in the glovebox.
     
    HotRodPC likes this.
  9. SDJunkMan

    SDJunkMan Full Access Member

    Age:
    60
    Posts:
    504
    Likes Received:
    267
    Joined:
    Nov 17, 2017
    Location:
    Black Hills of South Dakota
    First Name:
    Jeff
    Truck Year:
    1978
    Truck Model:
    K10
    Engine Size:
    350
    Planned to save the aux battery tray. My K20 is a plow truck, and a second battery was on my list of upgrades. Didn't know about the oil preuuure guage, will hold on to that too.
     
    HotRodPC likes this.
  10. bucket

    bucket Super Moderator Staff Member

    Age:
    36
    Posts:
    15,649
    Likes Received:
    1,609
    Joined:
    Aug 3, 2010
    Location:
    Usually not in Ohio
    First Name:
    Andy
    Truck Year:
    '77, '78, '79, '84, '88
    Truck Model:
    K5 thru K30
    Engine Size:
    350-454
    The auxiliary battery tray wasn't just a deisel thing, it was optional on gassers too.

    There will be a module to go along with the wiper switch IF that's factory. That switch and knob look slightly different than an original. The wiper motor fits a '78, you just have reuse the '78 bellcrank or whatever you want to call it.

    And I dig that front spare tire mount.
     
    Snoots likes this.
  11. RetroC10Sport

    RetroC10Sport Super Moderator Staff Member

    Posts:
    16,402
    Likes Received:
    450
    Joined:
    Sep 29, 2010
    Location:
    Austin, Tx/FEMA Region 6
    First Name:
    Jay
    Truck Year:
    1967, 1989, 1991; 1995; 2001, 2005
    Truck Model:
    Ford Mustang; GMC Sierra C1500 SportSide, GMC Syclone, Olds Silhouette; Aztek GT; Corvette
    Engine Size:
    200 L6; 5.7, 4.3, 3.8, 3.4; 6.0
    What he said.
     
  12. RetroC10Sport

    RetroC10Sport Super Moderator Staff Member

    Posts:
    16,402
    Likes Received:
    450
    Joined:
    Sep 29, 2010
    Location:
    Austin, Tx/FEMA Region 6
    First Name:
    Jay
    Truck Year:
    1967, 1989, 1991; 1995; 2001, 2005
    Truck Model:
    Ford Mustang; GMC Sierra C1500 SportSide, GMC Syclone, Olds Silhouette; Aztek GT; Corvette
    Engine Size:
    200 L6; 5.7, 4.3, 3.8, 3.4; 6.0
    Yep, you could get a 700 in a C20 up to 1988, 4x2 and 4x4. Hell, you could even get one in a C30 in 1982.
     
  13. Blue Ox

    Blue Ox Full Access Member

    Posts:
    332
    Likes Received:
    266
    Joined:
    Mar 27, 2018
    Location:
    LI-NY
    First Name:
    Derek
    Truck Year:
    1985
    Truck Model:
    K20HD
    Engine Size:
    6.2L
    If you save the oil pressure gauge you'll need to save the sender too. Unless you just want the oil pressure to look good, then use the 60 lb. sender.

    If it's still the original transmission, which I'd doubt, or at least if it's correct for the application, the diesels used a lower stall speed converter and the governor was programmed to upshift at a lower RPM. Just things to be aware of.
     
  14. SDJunkMan

    SDJunkMan Full Access Member

    Age:
    60
    Posts:
    504
    Likes Received:
    267
    Joined:
    Nov 17, 2017
    Location:
    Black Hills of South Dakota
    First Name:
    Jeff
    Truck Year:
    1978
    Truck Model:
    K10
    Engine Size:
    350
    The glovebox sticker shows RPO code CD4 inter. W/S wiper sys, nothing for the front mounted spare tire carrier though :). The PO also added a big chunk of chanel iron with tow bar tabs to the front, I think he pulled the truck behind his motor home.

    I'm gonna try to get the topper off it, and clean out the junk today so I can start stripping it down. There's a bunch of crap in the bed so I can't see all of the floor, but what I can see looks good.
     
  15. Snoots

    Snoots Supporting Member Supporting Member

    Posts:
    1,200
    Likes Received:
    1,239
    Joined:
    Jan 23, 2013
    Location:
    Georgia
    First Name:
    Roger
    Truck Year:
    1973
    Truck Model:
    Jimmy Sierra
    Engine Size:
    350
    When you remove the cover just underneath the steering column, the delay wiper module should be there. If it failed at some time the PO could have removed it to have functioning wipers. You WILL need the harness and motor. You will likely have to use your bellcrank (as bucket said).

    It's got a 'Hood Thingie' too!
     

Share This Page