Did you add Sea Foam or some other stabilizer?

 

Unfortunately no.

 

Now that your motor is running, check your intial timing. I know you said it was set at 10*, but check it anyways. Put some Seafoam, stabil, and heet in the tank. That will take care of any bad gas, water, etc. Then run that tank out and get some good new gas in there. Then start listening for strange noises. All bets are off with old crappy gas.

Possible causes for ticks:
Exhaust leak
Valve lash/noise
detonation (not likely at idle but possible with crummy gas)