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  1. 1984dually

    c30 dually drop spindles

    Kicking around lowering my 84 dually. Want to retain the Alcoa 16in wheels. Any fitment problems with doing that?
  2. 1984dually

    85 c30 frame

    Bought truck for parts a few years ago and this is left. Frame with front suspension. Hopefully some one in the NW area(or anywhere else) will need it before it gets cut up for scrap. Is FREE for the taking. Located in Malin, Oregon. Central Oregon down on the California border.
  3. 1984dually

    Swapping from dual to single headlights 1984 Dually

    Got my truck down for paint and 5 spd swap. Original 4 headlight support has seen better days. Have a good single light support from a 85. Will be getting buckets,lights and trim new. Question is will the grills interchange? Anything else i'll need? Thanks
  4. 1984dually

    NV 4500 oil

    Swapping my Dually from a 4L80E to a NV4500 manual trans. Most use Redline MT-85 or 90 oil. Can't get it around where i live without ordering it. Any other GL-4 rated oil that can be used? Been looking at John Deere Hygard as it is GL-4 rated. Run it in all my race transmissions and it holds up...
  5. 1984dually

    Dana 70HD carrier

    Want to change my rearend from 4.56 to 3.54.Need a carrier from a 3.73 of 4.10 truck. Any body got one laying around? Empty is fine.
  6. 1984dually

    Dana 70hd vs 70U

    1984dually, 8.1l/nv4500/ Doug Nash underdrive. Current 70hd has 4.56 gears and want to go to 3.54. underdrive unit will drop the ratio to around 4.56 when towing. Can change the carrier and gears in the hd but have a 70u from a ford that is 3.54. Anybody use a 70u? Know it uses dana 60...
  7. 1984dually

    Early buick th400 question for the trans guys.

    Have a one year only 64 Buick th400. Has only a 5 position selector(p,r,n,d,l) instead of the usual 6 position(p,r,n,d,2,1) selector. Still a 3 spd trans. Question is the internals any different than the normal 400? Can I swap a later valve body onto it? Trans is clean inside but still will be...
  8. 1984dually

    th400 electric speedo

    Any parts out there. Thanks
  9. 1984dually

    Center hump

    1984 c30 dually. Swapping to a nv4500 from a auto. Got a removable hump from a earlier truck and it is not even close to matching the floor pan. Correct me if I’m wrong but even the high hump floors from that year(84) was not removable? Is there that much difference in the floor pans? Local yard...
  10. 1984dually

    Front hub extensions.

    Is it possible to use the later hub extensions on 3/4 ton rotors? Wanting to use 3/4 ton rotors on mu dually and the extensions if possible.
  11. 1984dually

    Suspension interchange

    Are the a arms from a 85 c20 the same as a 84 c30? Also the front crossmembe?
  12. 1984dually

    Doug Nash OD

    Have a couple but need another for parts.what’s out there?
  13. 1984dually

    Wanted tilt, cruise, in manual trans column so I built one

    Been wanting a manual trans steering column with tilt and cruise. Looks to be a pretty rare item so I built one. Have two non tilt square body columns and two tilt columns from a 90 and 93 gmt 400 trucks. The Newer columns are 2 in longer from the upper mount to the wheel. Not good unless your...
  14. 1984dually

    Clutch switch pigtail

    Converting to manual. Need pig tails for clutch. when I pulled the pedals from the truck I didn see them as it was unplugged. Read a couple threads on the subject but no outlet for new. Any ideas on new ones? Will buy used if someone has some. Need 2. Thanks picture of switch
  15. 1984dually

    Clutch switch pigtail

    Converting to manual. Need pig tails for clutch. when I pulled the pedals from the truck I didn see them as it was unplugged. Read a couple threads on the subject but no outlet for new. Any ideas on new ones? Will buy used if someone has some. Need 2. Thanks picture of switch
  16. 1984dually

    2wd vs 4wd rear axle widths

    Got a 86 blazer 4wd and 85 2wd 3/4 ton. Rear axle housings interchangeable? Wanting to go to 14 bolt rear end. Thanks
  17. 1984dually

    85 c20 parts

    Bought this for the steering column. Drivetrain still intact. 350/sm465. Has hyd clutch system. Cab is rust free. 14 bolt w/4.10 gears. Front disc make a good upgrade for a pre 70 3/4 ton
  18. 1984dually

    8.1/4L80E harness

    Used this in my truck when I installed the 8.1. Been trouble free. Includes Howell efi harness(most tags still intact), cable throttle body, and ecm. $750 shipped in the US. 48 states. Located in Malin Oregon installing a manual trans and having a new one buil.
  19. 1984dually

    Manual steering column

    Looking for a manual steering column for a 84. Must be tilt and have cruise control. No steering wheel needed. Hopefully close to Oregon so shipping won’t kill me.
  20. 1984dually

    Sm465

    Bought this to replace the 4l80e in my dually. Has 32 spline output shaft with round pattern. A Doug Nash od unit will bolt to it and be used in a 2wd application which is what I was going to do but found a nv4500. Pulled the top to inspect and all gears and bearings look good. Replaced gaskets...
  21. 1984dually

    Sm465vsnv4500

    Looking have both to swap into my 84. With OD not being and issue which is stronger.
  22. 1984dually

    2004 common rail Cummins

    Looking at a 2004 truck that had a dash/engine fire. Common rail 5.9/nv5600 dually. 120,000 miles. Want to. Use a gm transmission but getting conflicting info on the rear adapter bolt pattern to the block. Seems they are listed up to 2002. Can anybody confirm the bolt pattern on the rear of the...
  23. 1984dually

    Column conversion from auto to stick

    Converting my 84 dually over to a sm465/Doug Nash od. Besides just taking the shifter out and calling it a day Can the column be converted to a manual transmission column? Have found a couple std columns but no cruise control. Can the stalk from mine be installed in a column that wasn’t cruise...
  24. 1984dually

    Clutch assembly

    Clutch linkage Pulled from a 77 c20 4x4. Would like to trade for a hydraulic clutch setup or sell. 125.00 plus shipping.
  25. 1984dually

    32 spline 4x4 output shaft

    Wanting to convert a 2wd trans to a 32 spline 4x4. Anyone got one

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