I HAVE A 1988 350 OMC COBRA, ALL FACTORY,IN A 205 FOUR WINNS, IM THINKING OF PUTTING ROLLER ROCKER ARMS ON IT. HAS ANYONE WENT TO 1.6 RATIO FROM 1.5 WITHOUT CHANGING CAMS, HOW DID IT AFFECT THE POWER AND TORQE CURVE. ALSO ANY OPPINIONS ON GAINS FROM, CARB SPACERS, THRU HULL VS OUTDRIVE EXAUST(DOING THAT ANYWAY JUST FOR SOUND OF IT). LOOKING FOR A FEW H.P. GAINS WITHOUT ANY MAJOR ENGINE WORK. I HAVE LOW HOURS AND 60 TO 70 LBS OIL PRESSURE