You don't mean to drive the alternator off the timing belt do you? My 86 Golf 1.6NA has no AC or PS. The alternator is driven off a v-belt from the crank pulley. It's stock so you should be able to find junkyard parts to do this.
well my cousins rabbit is rigged up with a longer pulley on the alternator. This allows all the other parts to remain on the engine without modification. The only downside is the belt is super long so it flaps around alot and wears out.