Went to napa and got the new belt, it arrived at my local store today. To get the clutch spread, I purchased a m6 bolt, 2" long, threaded the whole way up. Getting the belt off still took some elbow grease, but the new one went on with only a little grunting. Remembered I had a set of ratcheting wrenches, which made putting the cover back on way easier. Fired it back up and just did some slow driving around on the lawn, lots of starts and stops. Seems like it's fixed! Thanks for the info!