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  1. C

    Transmission identification help

    I have a 3 speed manual on my 1984 C10. The bell housing is aluminum. But, the transmission and the extension housing are iron. Using a transmission identification guide https://documents.holley.com/techlibrary_manual.pdf I believe my transmission is a Saginaw 343, but my extension housing is a...
  2. C

    four gas analysis

    I recently had a four gas analysis done on my 84 c10. The results stated I had lots of hydrocarbons in my exhaust (unburnt fuel). I have a 4.1L 250 with 40,000 miles. I recently replaced my spark plugs and wires. I have the original distributor. Does anyone know what I could do to reduce these...
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    transmission engine options

    I have an 1984 c10 3-speed column shift. Im looking to do an engine swap, but I want to keep the 3-speed. I currently have a 250cu l6. What engines would mate with my tranny? Thanks for the help!
  4. C

    28 or 30 Spline Information

    Hey everyone, I have a 1984 c10, and I'm in the market for a limited slip diff. Is there a way to tell if I have a 28 or 30 spline? I have a 250cu, 3-speed manual, and a 8.5 10-bolt. Any information helps.

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