I'd be a bit careful with turbo choice in tassie. It is not a flat state, and it also has more wet days than other area's. I think you would be happier with a turbo that doesn't come on too hard down low. I had a hiflow that made 250rwkw, but came on hard too low down and too often. In the wet and with a brass clutch, I had real trouble controlling it. Even simple things like taking off from a slightly uphill set of lights was wheel spin every time, no choice and no option. I went for another setup when I got booked for it, it was cheaper to do this than get fined all the time. Now my power is much smoother/progressive and much much more controllable. I have a GT3076 WG with the HKS cast manifold like you mentioned, and very happy with the set up.