After finding that my local indy had my timing belt off 1 and 1/2 tooth marks retarded on the exhaust cam-I made my mind up to tackle this job myself.
Dewfpo's instructions were right on and everything worked like a charm.
That was about three years ago-the only thing I didn't do was to use Oem pullies so I replaced all the parts again at 50k miles back during the spring.
If you have changed belts on 240's before this is a lot easier than those-just turn the car over by hand a couple of times after doing the job to make sure every thing is fine and all will be well.
Good luck
Poolman