I HAVE A 1988 FOUR WINNS 205 WITH A 5.7 CHEV OMC COBRA, LOW HOURS, AM LOOKING TO BOLT ON A FEW MORE H.P.'S. HAS ANYONE WENT FROM STOCK 1.5 TO 1.6 ROLLER ROCKERS IN A BOAT WITHOUT CHANGING CAMS. HOW DID THIS AFFECT POWER AND THE TORQUE CURVE. IM THINKING ON DOING IT FOR THE FRICTION REDUCTION ALONE. ALSO ANY OPINIONS ON A CARB SPACER. IM GOING TO THRU HULL EXUAST BEFORE SUMMER FOR SURE AND BIGGER SPARK ARRESTER, OR K/N HAVENT DECIDED, MAYBE SOMEBODY CAN GIVE ME AN OPPINION ON THAT TOO. ANY HELP WOULD BE APPRECIATED.