must be a thousand fukn threads on here like this one where the OP was too lazy to even skim through a over a decade of other "how do i go faster DUH" threads
congrats on starting your own, turned out quite well some good info here
if you been 20yrs outta the game you wanna be in front of these new fangled 450`s if your getting back in
if you gotta do the bottem end, 4mm + porting is totally worth it...