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  1. H

    rear defrost wiring 71 fastback mach 1

    at the switch i have constant, ignition, and a black /white wire that sends 12 volts while you hold the switch, which leads me to believe the switch is bad? also the connectors on the rear window are there but no wires running to them, does the the black/white wire go to the window? or does one...
  2. H

    71 fastback questions

    what 1/4 window regulators will work from other cars? also roofrail channel for weatherstripping? will coupe work? or cougar?
  3. H

    problem with tach with msd in 71 mustang

    well we r using the purple and green wires from distr to al6 that they ask for , its suppossed to work with the adapter im just wondering if the tach itself is bad?
  4. H

    problem with tach with msd in 71 mustang

    we tried the 8920 which u use when you use the purple and green wires from distributor and box
  5. H

    problem with tach with msd in 71 mustang

    working on 71 mach 1 with 351c, has a msd distributor and msd 6al box, problem is that the 6al box has output for tach so we tapped into it, and power to the other wire on the tach ( stock tach), and at idle its fine to start but after you reach above 1500 rpm it just dies, then will work again...
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