Although this is probably not appropriate for the DH2 (yet I am considering putting my jett 76L in the DR-1 VK triplane), Jett offers all of its engines in reverse-rotation configuration. Just a matter of ordering it that way with the clockwise crankshaft.

As noted, the huge advantage here is prop selection. There is a very limited selection of 'pusher' props on the market. The reverse rotation engine allows you to use any standard tractor prop, installed with the curved surface facing forward into the flight path. You have the ability to select the prop that performs best in that application, rather than compromising.

K&B use to sell reverse-cranks, as well did a few other mfgs. These were mainly used by folks wanting counter-rotating engines on twins... often overlooked as pusher engines. And as shown, those engines with bolt-on front ends can be rotated - this has been done many times over the years.

Dave..... that FSR sounds like just the ticket there

Bob