Folks often dissagree with this, but: Buy a three bladed (in my opinion) for reason stated above. Some cruisers go with a folding, but most of the ones I know do not. The barnacles in the warmer waters are killers (especially Florida) Who wants something else to have to worry about?
Besides, PB, with the 454 Chevy block you got in that boat of yours, you will want maximum thrust to outrun those barges!!