You left off ECi's (I)O-360.
In my case, that's what I went with because Lycoming was stupid expensive, Superior was out of business at that time, and ECi offered their engines in kit form.
So yes, not only did I assemble my RV, I also assembled my engine.
As for power output, in stock trim, they are all supposed to be right at 180 HP. Some, like ECi said their engine put out 188 hp. Can I tell the difference? No and I think the only way you can is to put the engines on a dyno.