Really very easy. There are 2 clevis pins to remove and replace. Then it is
worth checking the adjustment of the throw out nuts...... and that's it!

Incidentally, if your car has the original arm, it will be the very thin one
that was prone to bending. Later cars used a rather thicker version. You can
retrofit the thicker one to your car, no problem. In fact, you'd be hard
pressed to find a thin one now.