There's nothing particularly exotic about your set up - the other guys are right; set it at the 'usual' - 38-40 on pressure, try 14 or 16 on timing, back it off if it pings. Even if you dyno, remember that the 'learning' features of the computer are going to undo any changes you make to fuel pressure over time with pulsewidth changes if such changes take the car far enough from the a/f ratios the computer's trying to control to. If you really want to tune it - you need a chip/tuner/tweecer to alter the advance curve and fuel scalars at w.o.t.