From a performance standpoint and flat out speed the DellOrtos will be an improvement over the stock Keihin CV's but will not produce as much bottom end grunt (not that the 350T had much to start with). As far as intake length goes the only time you are going to see marked improvement on a dyno is with a bike that spends a lot of time at a specific RPM range i.e. a drag bike, land speed bike, or flat tracker. If its going to be street ridden its going to see broad use of the entire rpm range so tuning to a specific one won't be much help.