i did a search and came up with one post that had a diagram, but it showed as a red "x" on my screen, so i couldnt see it. anyway, how do i tie in the timing retard controller? the directions seem weird since they have you look at a GM wiring diagram for the btm, where the wires are different colors. the timing retard knob wires are green and ourple, how do i connect these? thanks.