What you need to do is take out the clutch fork pin. The pin has an 8mm thread that allows you to thread a bolt in, so it can be pulled out. First thing you need to do is loosen the lock nut / bolt that holds the pin in place.. it will be the only bolt/nut visible from outside the bell housing.
The longer bolt you can get to thread into the fork pin, the better..sometimes the pin can be stuck in there pretty good so it may require hammering, a longer bolt will give you more space to swing the hammer. What i do is thread the bolt in and clamp the end of the bolt with a vice grips. Then either wiggle the vice grips back and fourth while pulling out or give it a few taps with a hammer. You can use a slide hammer also, but probably not enough space to use it unless the car is on a lift.
In this picture, the clutch fork pin and bolt are directly under the torque tube. Not a great picture but should give you an idea.
