I ordered a 128k board off of eBay and I want to make sure it works when I get it since it has been sitting in the service box for almost 30 years. I would leave the floppy drive unplugged. I just want to make sure it gets to the blinking floppy without a problem.
Most 128k machines were upgraded to a Plus which replaced the rear bucket as the port layout is different. So if you find a Plus upgraded 128k/512k, you'll need a new rear bucket as well as your board.