Optimum setup for 302 heads

The valves that I like are somewhere in between a tulip and a nail head as this is what the 318/302 heads really like, and a partial undercut on the stems in certian areas of the stem really makes the exhaust flow with either the 1.50 or 1.60 valves, as when both have the same machining on them there's not much difference between them in flow. This way you can keep the chambers small and you don't have to enlarge them for unshrouding the valves. So now just by useing the right valves and with the right mods done to them there's at least 15/20 cfm's, just in the valves. Making the need for larger valves unnecessary. Also the smaller valves will make more velocity than the larger valves will when they make the same flow #'s with less area to get it by. This makes for better response from the engine and better fuel mileage, it will also increase HP and TQ. The reason that I would put the 1.6 on the exhaust is that the street engine seemed to work better than the 1.5 did because of the exhaust restriction of mufflers. There wasn't any difference at the track with the 1.5 or the 1.6 valves and open hedders.