yah, if you want to move to drag/dune, then it's time to move the porting durrations up some. already, you want to move the rpm's up for more power. i don't remmeber how your time/area is going to look, but i'll try to get you there again. what you have now is more of a dune/play or trail, depending on who you ask. think about how your power feels, and look into swapping the pipes out. it is also a good time to see the cylinder wear and burn pattern while you are in there. 30-31* blow-down is a good, safe place to be, but you can make the power more peaky and strong, or broaden it out by going more, or less........it's kind of a judgement call at this point, and if you are not gonna change pipes soon, you are restricted to the limits of the trinities....