1985 w/305 4barrel. New Accel SuperCoil. What should I set the timing at?

What ever the factory suggests. Adding that coil or ignition is not going to make a lot of difference one way or another.

I lost the tag on the radiator support during the restore and don't have a service manual.

This info is available from www.autozone.com. just enter your vehicle year and make from the drop down box, then go to Repair info.>specs and type in "ignition timing" or what you are seeking and it will pull it up

IGNITION TIMING


For your 1985 CHEVROLET TRUCK EL CAMINO:

IGNITION TIMING 0 DEGREES

TOP DEAD CENTER *SET AT WARM IDLE SPEED (500 RPM) *DISCONNECT 4 WIRE EST (ELECTRONIC SPARK TIMING) CONNECTOR AT DISTRIBUTOR *TRANSMISSION IN DRIVE (PARKING BRAKE ENGAGED) *ALL ACCESSORIES OFF