Prop for Saito 150 and DP Ultimate
I am flying that plane with a 150 and YS 20/20. 16/8 seems to be the prop it likes. You will have to modify the firewall to get the muffler to work on the 150 or 180, or go with a Pitts style. Since you do not have the engine and if monetarily you are set get the 180.
-Rick