So today I contacted Jak Stoll about tuning for my SPG. He gave me some good info on what I can do with the car, along with letting me know what components he could supply himself.
Since I don’t want to go too overboard with the SPG, (I’m only shooting for 230-250HP) He told me I didn’t need to go with the larger head. That a full downpipe/exhaust + his eprom chip and an upgraded APC should easily put me at that level.
So I’m going to look around, and keep reading up, and I’ll probably order his eprom along with some larger injectors soon.