Hey all, I posted this over at Zcar a few days ago, and came here to get a second opinion as well as some numbers. It looks like I'd probably end up taking off the ridge below the valve seat, port-matching, and doing a mild polish. How dificult would this be for someonw w/ no prior porting experience, and about how much HP would this net me if I were to upgrade intake and exhaust in addition to the port?