Cory M has a diagram on his site that might help you...
http://www.geocities.com/chevroletc1070/wiringdias.html
The blue wire is for an oil pressure sending unit.
The Green wire's I believe are for AC compressor and Soleniod. Or for a temp sending unit near the thermostat housing ( Gm used green for both ac (light green) and temp sender wires(dark green)
The Pink hmmm nothing comes to mind right off hand. Possibly your old ignition coil + supply wire?