I really dont care its just funny that someone thinks his hand porting is better then the CNC machines that are made to do the port work. There aint no freakin way and to do what he did to ur heads aint going to help much. U were better off buying ls6 heads or getting a set of 5.3 heads and bolting them on. Many people have tried to do what he did to those heads and they didnt accomnplish anything. most shops will get the heads cnc and the polish them afterwards. what he did was a waste of time. If he would have got the stuff tested then u would have seen that but he didnt. To me without numbers to backup the work is useless.