I used a 530039143 ignition module on my Sears Bushwacker 358798280. The plug wire and kill switch connector are on the wrong side, so I had to grind a bit off the cooling fins to create clearance. So far it's been working great.
Here's a photo:
I rescued this machine from the trash after it sat under a house for ~15 years. Cleaned the carb installed new fuel lines and it fired right up. It's now my favorite weed eater. Long live the old Husqvarnas!