Hi guys, I have a black scorpion 5.7 330hp mercruiser motor. I have just recently finished the 300hr tune up. I have done work on Ls1 motors and when installing a big cam you drill a 9/32 allowing more air into the motor when the t/b is closed. It helps with the Idle and the hissing, as well as when getting off the gas fast it wont die. I was wondering if any of you have doen this. thanks