H-1's tail rotor swap to the left side.
Helispotter,
The swap of the tail rotor to the left side involved the maximum clearance between the T/R blades and tailboom during maximum flapping. The right-hand side minimised this clearance while the left-hand side maximised this clearance. The aft-over-the-top direction should be described as up-into-main-rotor-downwash (same direction, actual reason for direction of rotation) for additional lift.
Ott