actually a 305 can reach well over 320 horses and you saying it cant is ignorant on your behalf...the 305 ho is a good motor and can have alot of horses as can any other motor...keep in mind all the bolt ons for that 305 will fit a 350 and a 400 so go ahead and do what you want eventualy youll want more cubes and your money wont be wasted cuase guess what all your external mods will bolt right on a 350 or 400 so have fun with your 305 and prove this guy wrong please i have pulled 375 horses out of a 305 without a blower and thats more than a 350 with a few bolt ons...good luck