you know the tube that goes into the tb from the valve cover ? yeah , well that is the factorys way to do what you are wnating to do , my sugjeston would be to leave it alone and spend money on something else , the vacume of the motor sucks the air out of the crank case and it also promotes ring seal .. you can remove it , but your rings over time will be more prone to blowby ... in other words ... you dont want gas in your oil
do you still have the 4g15 in there ? if so i would not do hardly anything to it cause it is easy to **** up those motors with stupidity .(trust me i know ) how many miles are on your motor ?