I spent sometime the last few days, when it hasn't been raining, working on the steering. I ordered a steering link arm ($12) to attach from the steering cable to the outboard, but I'm not yet convinced it was the right part. I mounted the outboard to the transom and tried to do a dry run and see how far the steering cable would push the outboard, but it doesn't seem like there is a very big turn radius.
I also checked the location of the cavitation plate to the bottom of the transom and it looks like the outboard is about 3" low. This means I'll have to fasten/epoxy/fiberglass a piece of wood to the top of the transom to make up for the difference. If I don't I'll likely end up with porpoising and poor planing performance. Next week is looking to be low 60's all week so I'll be able to get some more work done. The garage the boat is currently in is a very tight fit and makes it hard to do any work. Below shows the outboard mounting and some of the steering components and the steering link arm I purchased.