i also want a little more from my sbc's in my 28 cig but dont believe that headers k&n or ecu mods will get me much hp( ive been told 50 hp per side) blowers may be the trick, but there goes the warranty! what to do, what to do

TS, I don't think bore size affects RPM, but I'm no engine builder. Perhaps a post in the Tech section will get you your answer on that question! good luck and let us know what you decide. BTW, let's see some pics of your boat!

dreamer...I got one word for you ProCharger...:D :D