[dscott]

Snake, I haven't used the Holley system but it sounds like it's the same as the MSD. You need to have an ignition source to the box so I would assume this is the smaller red wire, it would be wired to wire # 128 which is the old ignition wire to the coil. The white wire is usually for a trigger that you won't use. The purple and green would be for the dist. On the MSD system you need to cross the wires to the dist. Green to purple, purple to green. Your blue wire from the dist may be purple? That's the way most Ford dist. are.
Don