If you want max thrust from a 60 use 14x4s. Zinger makes a 14x4 wood prop and APC makes a 14x4W that should get you into the neighborhood of 10 lbs thrust. The APC 14x4W isn't stocked very many places, but you can order them direct from APC on the web.

Myself and a friend have experimented with many, many props and the 14x4's are the best for thrust on strong 60's. They also are serious airbrakes on the downlines and on approach. The APC 13x5 is a good prop if you are willing to reduce max thrust a bit for a straight & level speed gain.