'73 C10 auto to manual trans swap?

Discussion in '1973-1987' started by Dshock47, Mar 30, 2014.

  1. Dshock47

    Dshock47 Member

    Joined:
    Mar 30, 2014
    Messages:
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    Im new to this forum thing but it looks like there might be some good advice help here.
    I have a 73 C10 2wd. 350 with a TH350 trans. Little bit of motor work some time ago, and tranny has had work a few times over.. Now with a 1ton torque converter and shift kit. Iv had the problem a few times before and it happed to me again today.. Spun the input shaft on the tranny i am quite sure again. I always have wanted a 4 speed manual in the truck. I am wondering what kind of 4 spd's like to get put in these trucks? And how hard is the work? Thank you for any advice.
     
  2. nerfherder78

    nerfherder78 Member

    Joined:
    Aug 15, 2003
    Messages:
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    Location:
    Fairfield, CA
    The two most common manual trans you will find in these trucks are the SM465 and SM420. Both are 4 speed with a granny low gear (G-1-2-3).

    If you want overdrive, you can also get an NV3500 or NV4500 5 speed from a '90s truck. From what little I've read, the NV3500 will bolt in place of a SM465, but you need to get one that was behind a 4.3L V6, or a 305/350 V8.

    As far as how hard it is to swap, all I've done was help my brother put pedals from a manual into his '73 K5 (bit of a pain, but just bolting stuff in), but it still has the th350 that came with it; so no idea on installing/setting up the clutch, cutting a hole for the shifter, etc.
     
  3. Stocktongoodrep

    Stocktongoodrep Member

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    Aug 13, 2015
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    Location:
    Stockton, CA
    Was wondering if anyone has knowledge of a high hump cover for a four on the floor with grany cover I have a picture of one...
     

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