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engine identification needed

Discussion in 'Trucks and Trailers' started by Garet, Apr 18, 2001.

  1. Garet

    Garet LawnSite Member
    Messages: 157

    I need to figure out which year my 350 is. The engine code in the back is 6970010 if I didn't read it wrong. I need to get a new oil sending unit.

  2. Garet

    Garet LawnSite Member
    Messages: 157

    make that 6 a 3. my bad.
  3. Garet

    Garet LawnSite Member
    Messages: 157

    According to one site this is the block used from 69-79. What info do I actually need to tell which sending unit to use?
  4. Alan

    Alan Member
    Messages: 1,185

    I think the sending unit will depend more on what year and options the truck has than what year the engine is. If you have guages you will need a different sender than if you have idiot lights.
  5. Garet

    Garet LawnSite Member
    Messages: 157

    I just bought a mechanical guage and it has a sending unit in it which is almost the exact same size as the one I just took out. I don't see why I just couldn't put this one in. How far off could the reading actually be?

  6. 75

    75 LawnSite Senior Member
    Messages: 992

    Garet - looking in one of my books, casting # 3970010: years used; '68 - '76. Same block that's in my truck actually.

    As for the sending unit question, you say you just bought a mechanical gauge. Does it come with a sending unit, or an adapter to connect a small flexible line to your engine & pipe the oil right into the gauge?

    Regardless of what it is, I would use the components that came with your gauge. No point taking any chances with your oil pressure reading!

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