Looking to get 400 N/A...

Just like the title I had a powerdyne on the car and took it off before I tuned the car. The car is all apart and I have a chance to make some changes. Id like to get as close as I can to 400 N/A
This is what I have right now
347 Strocker
Trickflow TW Heads
Trick Flow Track Heat Intake
Trick Flow Stage One Cam
2600 Stall
Built AOD Trans
1.6 Rockers
And some other lil things
Now I have 1.7 rockers sittin in the garage along with a Stage two Trickflow Cam
When I bought the Car it had a Mail order chip on it with 4 settings. Well When I went to a dyno day it wasnt on the best setting and the only pulled 270 hp and 333 tq The guy said it just didnt seem right. But I k now that the car has more being I ran 13.2 before I had a rocker problem and had to stop for the day. The car can run an easy 12.9 I know.
So what things should I change to try and get close to the 400 mark without Nos or a blower?
Anyone have any ideas

I actually have High Compression 10.5:1 thast why I took the blower off. And like I said the numbers where low my settings where not at there best. I have the stage one cam in but i was going to upgrade to the stage two cam. I have long tubes right now with 2.5 right now yes. I mean if im above 350 like in the 375 id be happy.
The heads are off right now and i was going to have them ported but the guy that was going to do them is very far behind and I am in need of a car again

I dont know the headers off the top of my head. And I have the build sheet on the motor from when I bought the car. Thats what im going off of anyways. And the TFS 2 cam I asked was to the fact i have one sittin in my garage and wouldnt have to buy one.