86, you are correct. Track wear side to side is not very important because the rear end has an open differential which compensates for different track speeds. Also, front and rear effective gear ratio(gear ratio and tire wear) mismatches within reason are not too important either if the halftrack is driven properly. On pavement driving, the front axle should be disengaged so it is free wheeling. If engaged on pavement, the drivetrain will “wind up” and something will break. When the front axle is engaged off-road, there is always slippage so the axles won’t bind(wind) up. The only thing that is important is to match the pitch of the track and sprocket. Think of trying to put a small chain(the track) onto a sprocket with big teeth-doesn’t work. As long as you use the new flanges with the new track you should be good to go.
