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Thread: 8770--- for the 80's

  1. #1
    msdtech1955 Guest

    Default 8770--- for the 80's

    here is an oldie ....8770.




  2. #2
    rmefford Guest


    Is it possible to hook a retard control [8770] into my already working 7-al2 and 2-step ignition. If possible, could you furnish a wiring diagram of this?

  3. #3
    msdtech1955 Guest

  4. #4
    rmefford Guest

    Default happy to be a member,8770 lives again

    This site rocks. Thank you msdtech1955 for the diagram, your the man. Wiring it up tonite thanks to you.

  5. #5
    rmefford Guest

    Default upon further review, 8770 intall

    Hate to be a pain,but how does 2-step wire into setup? Car really hauls butt & would hate to screw up now. 2-step is now wired to trans. break & works great.

  6. #6
    msdtech1955 Guest


    here ya go.

    7220-8770-8739-dual relays launch nitrous.jpg

    7220-8770-8739-dual relays launch nitrous.jpg

  7. #7
    Join Date
    Feb 2015

    Default Autotronics/msd 8760

    Hello, I just bought a altered and it has an old 8760 retard control box on it, I am a little confused as to what it is for. I also would like to know how to wire it as it is unhooked. Any help would be appreciated. Thanks!

  8. #8
    msdtech1955 Guest


    was it a blue or silver box unit?

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