I had an idea for a front diff for a 415 and was wondering if anyone had tried it?
If you were to switch the positions of the spur gear adapter and the one-way pulley on the layshaft, it would move the front belt over to the left of the chassis. With the front belt now towards the left of the chassis, all you should have to do is purchase another rear diff and flop it around.
Some minor modifications would need to be necessary to the layshaft but I was wondering if this would work.