If the clutch is just tight on the crankshaft, and the nut was done up really tight against the clutch, the clutch may be very tight on the crankshaft rather than slightly tight. You may find you need such a serious puller that you won't want to buy it just for this one job. You may prefer to take the engine to the local garage and have the mechanic pull it off for you.
The end of the crankshaft does not have a center-drill impression, and most pullers have a point on the pulling screw which requires this impression. If you do this job yourself, put a small piece of aluminium in the recess first, so you don't damage the point on your puller. There is an interesting mark on the end of the crankshaft as if somebody has done this before.
