Hi Kevin what are you after the part number or what the job entails,is it a 39 truck?If so Diesel or Gas?
On the 39 range with the VW engine it is pretty straight forward,remove side cover and all timing belt covers,remove bottom pulley and you can see the timing marks.You don't need any special tools.I also mark up my own reference marks as well.The belt adjuster has a mark on it for correct tension.If its a diesel you may need to fine tune the pump timing but you can have to do this with the lap top.
Hope this is what you wanted to know ta.