Help with 1977 Dayton 16 HP aka 990

So I bought this Dayton off Craigslist for 150 bucks. The guy said with a little tinkering it shoild be up in running in a few hours. Nope it is missing pretty much all tje electrical.The good is that its an Arizona tractor 0 rust. But again its sun baked. I am missing the seat mount and seat, the right foot place, and of course all the electrical. The starter generator works and it has great compression. I need advice on a wiring harness, and how to get spark since I am missing most of those parts to. Did I get y self in to deep.