If you run #2 to the coil you are not getting 12v, unless the coil has been replaced with an HEI. Run the #2 to the bat temporarily to check the system. If you leave #2 connected to the bat you will have 12v to the alternator whether the ignition is on/off, not recommended. Here's another link same problem you have except a 81 truck;
http://www.practicalmachinist.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic;f=30;t=004315;p=0 Larry
