ticking could be a number of things, not just the spark plugs. I would definitly monitor them to make sure its not a loose plug, and torque them correctly. but it could easily be from a timing chain guide or a stuck valve.
2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.