It's a rocker arm tapping at valve stem. Hydraulic lifters (hydraulic rocker mounts) are the common reason for the ticking. If it doesn't go away when the engine heats up, consider replacing the lifter where the ticking comes from.
Check battery and starter.
You should have an auto mechanic check the car or take to the Ford dealership.
Could be a bad turn signal flasher
If it is a 4.0 SOHC then they had many issue with the CAM chain guides. Upper and lower, we had ours replaced under warranty 6 times then the FORD deal said they would no longer warrant it. Almost sound like a diesel when at idol.
Ford XM Falcon was created in 1964.
Ford EL Falcon was created in 1996.
Ford BA Falcon was created in 2002.
Ford BF Falcon was created in 2005.
Ford XK Falcon was created in 1960.
Ford XE Falcon was created in 1982.
Ford XB Falcon was created in 1973.
Ford EB Falcon was created in 1991.