^^ya that did bewilder me for a moment....
anyway, it does kind of depent on what you want to do with your car. if you want to drag race it, then you are going to want to go balls to the wall and go for either a turbo swap or a full set up. if you want to do SCCA or ITS, you need to see what you can get away with. i am in a similar situation as you and i am just going to be building an N47 L28 (ripping out the exhaust sleeves) with slightly domed pistons, cam, 6-1 header to 2.5 and SUs. that's fine for me. if you want more power, i suggest checking out a 3.0 or 3.1 set up..... just my $.02