!@#$%^&*heads

Every head is slightly different,I reccomend getting a junk head and either cutting or grinding through a couple of the critical areas to give you an idea as to how much is there.But,if you are conservative you should not have a problem and get quite a bit more flow,as for tools I like electric and use a makita die grinder,much faster but it takes some getting used to,also invest in a hegglesen e-tool or fab a similar tool up,it is a must have imo when doing the pushrod pinch area to get the max area without breaking through.Ive ported alot of different heads-mainly because I got stuck with whatever my buddy brought me,1.88valves,2.02s,some with slightly sunk valves,even 318 heads on a 360 with the stock 1.78/1.5s and it was fully capable of 12s,so as others have said it really depends on your combination.