Call Craig Catto, he will give you a 68" dia by 64" pitch prop for that plane, IIRC.
Same prop I had on my -9 when it was powered by the O-290-D2. It made a great climb prop for me but would probably be perfect for your -3 with the O-235.
BTW, I was on the redline (2600 RPM) at 165 MPH but at WOT it would take me up to a bit over 175 mph at 2780 RPM.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC