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Thread: vacumn source for K5\LS conversion

  1. #1

    vacumn source for K5\LS conversion

    Recently put a 2002 5.3 in my 86 K5. Runs great and i love it. Got ac working now but vents are stuck due to no vacumn source. What's wrong with drilling a hole in the truck intake and epoxying a fitting? is there any location i should stay away from. I don't see any ports except the brake booster.


    thks
    Steve
    66 Chevelle, 454, 200r4, 12.9's, 86 K5 with 5.3

  2. #2
    Join Date
    Mar 2012
    Posts
    129
    I would at least tap a hole and stay away from epoxy... just my two cents. Or the way i would really tackle it would be to get a tee and tie in to the same port as the brake booster.

  3. #3
    The brake booster fitting would be difficult to tie into. I have since found a fitting on the ps of the truck manifold that must be for optional use. It is molded with a break off tab. When u break it off, the barbed port is exposed.

  4. #4
    Join Date
    Jul 2010
    Location
    Douglasville Ga
    Posts
    224
    You got it! Can also be used for a trans modulator.

  5. #5
    Join Date
    Feb 2011
    Location
    Fort Worth Texas
    Posts
    143
    On that same note,how about tying in for a vac guage with a car manifold? Would a tee fitting on the brake booster give an accurate reading,or is there a better place? Thanks.

  6. #6
    Join Date
    Dec 2010
    Posts
    181
    Quote Originally Posted by exboatracer View Post
    On that same note,how about tying in for a vac guage with a car manifold? Would a tee fitting on the brake booster give an accurate reading,or is there a better place? Thanks.
    That will be your best source.

  7. #7
    Join Date
    Feb 2011
    Location
    Fort Worth Texas
    Posts
    143
    T-fitting it is! thanks for your reply.

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