Here's the problem with just removing one line and capping the other hole (or leaving it open)
Have fun - this job should keep you busy for several hours and depending on parts are needed and where you have to get them could stretch into a week of occupation.
Wow! You put some serious thought into that. Thanks. I see your point about not being able to just cap it. I haven't rebuilt one of the calipers yet, so I couldn't see how they're designed. I would definitely replace the caliper with a standard single bleeder one if possible or just run it factory built.
04 Sportsman 600 4x4