Hey kale,
sorry to rain on your parade but 100 (ish) rwhp is all you can hope for. All your mods are great but not really enough CR for big horsepower. The 40mm carbs will limit the result also. Tommy shows that 100 rwhp is a very good figure - I only had 90 in my coupe and it was reasonably quick. Take heart .... do the power to weight calcs for your car and a production XR8 or HSV. You will be suprised how well 100 rwhp can move 700 kg of car
Cheers