All that with a little tuning. If you're in Atlanta, and you need a tune, give Aric a call at 678-449-6871. He does SCT tuning, so you get a handheld flasher that holds 3 tunes, and you can switch between them.
Steeda underdrive pullies
C&L MAF
Flowmaster weldins
MAC prochamber
Since then, I've added/swapped:
T56 transmission
4.56 rear
MAC catted H
The tranny/rear/cats dropped me quite a bit, as you can see from today's baseline, but Aric got most of it back with the tuning. I bet I'd be over 310 now if I still had the prochamber and stock rear.
It shows the difference between the two runs at 4200 rpm, so you can see the midrange gains as well as the peak. I only picked up 6 hp at peak, but I got 17 at 4200 rpm.