You can get a 1985 style VW Rabbit wiper motor. You will need to fabricate a bracket to hold it from the upper cowl and you will weld the end of your nova/camaro arm to the VW arm.
You can position it in the cowl and smooth it over. There is a simple re-wire needed to make it work and you are off and running.
You can also obtain a later model column mounted wiper switch and use it instead of the dash mount. This gives you more room on the dash for another gauge. In my case I put a fuel pressure gauge where the wiper switch was.
