On the list of parts needed for 2.0 "conversion" it has sway bar mount set listed, whats the difference between 1.0 and 2.0 if using 1.0 arms currently? Also when putting the 2.0 diff housing on the 1.0 chassis, do you just leave out the bottom screws that go through the bottom holes and into the front housing cover? Those holes are like, just slightly off and the button heads wont clear the open hole.