What kind of power increase am I looking at?

I dynoed at 225rwhp and 290rwtrq. I have mildly ported heads with 1.84 intake valves. And a full exhaust. More details in sig.
I plan on going with GT-40 heads, not the 'P's. And an explorer intake along with 1.7 roller rockers. Not sure if I can get a new TB for what I want to spend, but I am going to search for an Explorer one.
I'm probably going to port the heads and install 1.9/1.6 valves.
What would you guess at the new rwhp?
Also, any suggestions?
Thanks

Ok, but still go with the GT40's right? I can get them at a decent price. I was going to do a whole valve job and refresh on them anyway, that is why I was thinking of larger valves.
And now I need to look for a TB as well.
Thanks