I have a 1987 ArrowGlass 21' bowrider with a 175 hp 2bbl 4.3L V-6. Launch is good but wide open top speed is only 34 mph and cruises 24 mph @ 3000 rpm. I can get hold of a 225 hp Vortec 4.3L engine. My questions that I need knowledgeable opinions on are 1.) If I up-power will I truly notice 50...
