Planning the top end rebuild on my Honda ! I want round bores w/ a good overbore & most certainly a ported head...I'm trying to build a "sleeper" w/ stock carbs & mufflers,cam,etc. I want to try to get the most flow that the Stock parts will allow while keeping the best low end torque & midrange power w/ a little extra on the top end. I like quiet mufflers for this one...& if I ever change my mind, it will be ready for more flow if I feel like that is good.