84’ GMC Jimmy 383 restoration

Average User Rating:
5/5,
  • 7A34C511-EB16-42D3-988F-B6D39A3A42D8.jpeg I purchased my first K5/Jimmy September 2019

    I have been wanting one of these for a very—very long time. When I picked it up it was a running driving unit. It needs some work but nothing out of the realm of my capabilities. Almost all the rubber needs replacing and now so does the engine.


    The first major obstacle was the drive shaft. The drive shaft that came with this truck was torched. The CV had broken and sheared the ball cup off the yoke completely:
    D7D5BA7B-9ECB-4769-AA53-97E94DE7ECE2.jpeg

    So I had a brand new custom drive shaft made for me featuring all 1350 U-joints by Drivelines North West here in Washington. Great customer service and fantastic guys. Definitely go to them for your driveline needs:
    5A1143BE-1014-476A-8729-5101B33F8A70.jpeg

    Life was really good after that:
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    Then after taking it on its first ‘maiden voyage’ round trip of just over 80 miles, the thermostat stuck on me during the drive along with a faulty temp gauge and caused me to blow a head gasket:
    20A909AF-A064-4252-A6F8-74DAE9A43798.jpeg


    So, like any man with tools, I began tearing the heads off the engine. A coolant pressure test showed a stuck thermostat and compression tests showed cylinder 8 was full of coolant:
    C85A2CBD-E893-415E-990D-5BFEC6BF140A.jpeg

    After inspecting the cylinder walls I am still not 100% they are not cracked in #8. It appears a ring seized/broke or possibly someone had broken a spark plug end into the cylinder at some point:
    3E96BD45-0E59-4F67-9438-F9D1A31DEEB8.jpeg

    I have the engine dropped off at the local engine machine shop to be inspected and if good will be punching the block over another 030 making this 383 effectively a 388:

    CC49685C-F5E4-4F54-955D-F9AAF31BFD2F.jpeg

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    In the meantime I am able to button up some of the smaller things.

    LMC Door Panels and Manual windows installed:
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    Fixed the wing window handles that were flopping around:
    3E8515FD-36B9-45F1-AEDE-7F3E2ED3F7E1.jpeg B04157D4-0ECD-4F66-9F23-BACF1E7135C2.jpeg

    Painted the radiator support:
    AF59D4F9-1249-4AC2-84EF-39F24E5E4F30.jpeg
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    Made a custom headliner since the original was falling down:
    6A37922D-F9CF-4A6E-A09E-B299396BDC26.jpeg D555D3A6-D2DB-4127-ADB0-B90BD40583FD.jpeg 235A20FD-ED4B-4721-8678-1727D99C436C.jpeg

    And as of creating this build thread 10/7/19. That’s where we sit today. Hopefully by the end of October I’ll have a new/freshened up motor and be back on the road before the holidays.

    11/22/19

    Motor is back from machine shop:
    Eagle 383-C Crank
    Speed Pro Pistons
    Comp cam 268
    Scorpion roller rockers
    Trick flow aluminum heads
    Edelbrock performer RPM intake
    QFT Slayer 750

    467F1DD7-4E01-48A0-9A72-4860FC2D3294.jpeg EFAEC995-249D-4119-97E5-D178E3E753C0.jpeg

    Engine is in and running. Still needs a tooth bump clockwise on the distributor.

    4ACC5E56-5B97-4528-95CE-13CEB8A5CA0D.jpeg

    Cooling problem was sorted out and narrowed down to the fans. Electric fans out and flex-a-lite went in. Runs at the perfect temp now.

    C5327F4E-0A8B-4490-896F-223984897E6B.jpeg

    Pretty sure my trans pan gasket was mashed from sitting on a jack and block of wood with the weight on it. So I’m planning to have that fixed today as well.

    Still has an exhaust leak in the passenger side I’ll have to address as well.

    We are getting closer to being back on the road. Hopefully by tomorrow 11/30/19 I can take it for a quick test.

    12/4/19

    Still no test drive yet. Fixed the trans pan leak and retorqued the valve body while in there. Burnt my starter up. Will be getting one of those mini high torque units.

    Hood is on. Got the grill letters outlined in Chevy orange.

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  • Year:
    1984
    Make:
    GMC
    Model:
    Sierra Classic
    Factory Options:
    AC
    Engine:
    383 SBC:

    Eagle Crank
    Forged Speed Pro Pistons
    H-Beam Rods
    Comp Cams 268
    Trick Flow Aluminum Heads
    Scorpion Roller Rockers
    Performer RPM Intake
    QFT Slayer 750 DP
    Transmission:
    Monster 700r4
    2500 Stall Converter
    Transfer Case:
    NP208
    Steering:
    Stock Steering w/
    ORD Stiffener Kit
    Suspension:
    ORD:
    Greaseable Shackle Bushings
    Engine Cross Member
    Sway Bar Kit



    4” Suspension Lift
    Bilsteins
    Axles:
    4:88
    Rear: 14 Bolt
    Front: 10 Bolt W/ 8 lug conversion
    Wheels:
    Weld
    Tires:
    35”
    Paint:
    Gun Metal

Recent Build Reviews

  1. America.Mike
    5/5,
    "Awesome build man!"
    K5Devil likes this.