You will need to remove the
transmission from the flywheel housing. Then you will see the flex plate bolted to the flywheel, and it can be removed by removing the five fasteners holding it to the flywheel.
Of course this simple sounding procedure might entail sliding the
engine forward to remove the
transmission, or pushing the prop shaft back far enough for the transmission input shaft to clear the flywheel housing.....
Of course, if the "clack, clack"
noise is just in
gear at idle, you might just decide to avoid running the
engine at that
RPM in
gear.
DougR