I have replaced the timing belts on my '86 Subaru, and the marks are there, you just have to follow the instructions in the Hayes book very carefully. Since this is a boxer engine, there are two belts. The book will tell you that you need several special Subaru tools, but I was able to improvise; just figure out what the tool is supposed to do, and you can improvise as well. All that is really needed is to turn the pulley to generate slack in the belt so the tensioning spring will adjust properly.
Hope this helps.