1974 c10 ignition wireing confusion

[1974carl]

I need to know what wires go where from the firewall to cool,starter, distributor, coil etc. currently have 350ci with a points dist. I have a MSD6a cotrol unit in truck but not sure if it works. Please help I'm about to loose my mind

[rich weyand]

The wiring diagrams for your truck are here:
http://forum.73-87chevytrucks.com/smforum/index.php?topic=11766.0