TOPIC: volvo penta bb70 help

We just aquired a 1962 glasspar with a volvo penta bb70 stern drive. Long story short....but flooded with water. Have changed oil 3 times, plugs and everything electrical. I'm looking for the oil filter and what type of oil to finally put in it. I'm assuming the filter is in the oil cooler but I'm getting conflicting info on this and what type of oil to use. Napa part 1304 for the filter but 10/30 engine oil or hydroid 90??? Is there a manual to look up instructions? My experience is in cars not boats and the boat sinking along with broken bow eye has me doing alot of work. So far so good. Now I'm in the final stages of putting her back together. If anyone has info or experience with this engine it would be so helpful. Thanks so much in advance!

Here is where I'm assuming I'll find the filter..