With the mods you have right now I'd say 260rwhp and 310tq. Your going to have to get some P specific headers, might as well just switch to long tubes. Add pulleys and degree your stock cam and you could be around 280. Ask tmoss about degreeing the stock cam to help performance.
no money for afr's =( i really dont have the money for the long tubes but i dont know i wll try my headers first and if no work i have to get overnight shipping on some long tubes =(
I'd suggest you look at the flow difference on the GT40P heads from .400" lift to .500" lift - about 4cfm, so the 1.7s won't net you much going from .444" lidt to .476". Have you already ordered them?