If my memory serves me correctly, there are specific clocking procedures for CS props on certain engines. The 200 HP with a certain counterweighted crank seems to come to mind. As for the 235, and my o-320, fixed pitch props can be indexed at any position. If you have a dynamic balance done, your balancer guy may reindex to get lower numbers with less weight. He will always use the horizontal positions first to enable hand propping.
Regards...Chris