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Thorley owners- need advice

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by FWP, Dec 8, 2001.

  1. FWP

    FWP CRS

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    If anybody has installed these headers, I need some help. Model 364Y. Does anyone still have the installation instructions??

    I have a new motor installed, and I'm working on installing all the accessories and other bs. I don't have the headers yet, probably won't be here until Wed, and I want to get as much done as possible before then. I would hate to bolt on a bunch of stuff just to find I have to take it back off to install the headers. Any advice would be of great help. Thanks!

    <a target="_blank" href=http://coloradok5.com/gallery/75K5>http://coloradok5.com/gallery/75K5</a>
     
  2. GRINCH

    GRINCH 1/2 ton status

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    Please be more specific? What motor? What type belt system?
    I have them on a 90 k5 with a 96 Vortec crate, I can take pics or tell you what you need if you tell me more details. I put my new motor in with the headers on. (it helped having the front clip off)

    Let me know!!! Glad to help...

    The Few, The Proud, The K5 Blazer
     
  3. ricka

    ricka Registered Member

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    I've got Thorley headers, but they aren't that part number. Didn't need any
    instructions to install them on my 77 Blazer with 400. It's real straight forward.
    You'll love them. Best header you can buy IMHO.

    -------
    Rick Anderson (rick.d.anderson@tektronix.com)
    Tektronix, Inc. Beaverton, OR 503-627-2630
     
  4. FWP

    FWP CRS

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    Sorry bout that- It's a pre- emissions 350, nothing fancy, standard v-belt system, with A/C. The motor's in, Do the headers go in from underneath? Or what's easiest? Thanks.

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  5. FWP

    FWP CRS

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    Rick, did you install them from underneath, or from the top? Do you remember what components were in the way (that you had to remove) when you installed the headers? Thanks!

    <a target="_blank" href=http://coloradok5.com/gallery/75K5>http://coloradok5.com/gallery/75K5</a>
     
  6. GRINCH

    GRINCH 1/2 ton status

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    When I installed them on my 90 I had them on when I slipped the engine in.

    I put them on my 91 Blaze I put them in from the top, I remember i had to modify the alternator braket. I also remember the back bolt was a bit%^^. Be sure to use high temp sealant on both sides of the gasket.

    Just start putting them in and if you run into any probs I'm sure most of us here can help you out.

    Good luck.... You will be happy with them

    The Few, The Proud, The K5 Blazer
     

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