You won’t find an owners manual for your boat. I don’t think Aquasport provided them then. At least I never received one for my 170 that I purchased new in 1985.
The good news is, there’s some excellent documentation in the Classic Aquasport Gallery including catalogs and brochures. So you can find pictures of your model. There was very little change in AS models from the late 70s to the mid 80’s, so you brochures of that era will provide what you need.
Here’s something to get you started.