Have you called Ed Sterba? Sensenich also has recommended prop/engine for cruise or climb .... if your clean and tight with fairings and wheel pants, properly rigged, you should see 160 + at 75% power....
 
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.
 
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