Tell me if this is a Good Plan

Alright, I have spent a lot of money and my car is slower than hell.

So I was wondering if I could sell some stuff to start buying better components. This is my plan:

Sell:

BBK Full Length Headers ($100)
BBK X Pipe ($100)
American Thunder Cat back ($300)
GT40 Heads ($400)
the 1.7 rockers ($125)


Buy:

Trick Flow Twisted Wedge Heads
1.6 Roller Rockers
Isky Cam (.480/.500 w/1.6 I think)
BBK Short Tube Headers
BBK Offroad H-pipe
Borla 3.5" Catback (Or is it 4"?)
24# Injectors
C&L 76mm Mass Air Meter with Tru Flow Pipe

I figure I can get a lot more power outta those heads and then with the cam and stuff really wake this engine up. Is this a good idea, I figure I can get at least that much outta those things I have then have to just work for the rest. Do you think I will be around 300-315RWHP?

yeah they are chrome, they have some rust on them though. I will lower the price of the catback system.

do you think I will get some noticable power increase?

I don't know exactly what I want to do..... I have to check to see what I could get outta these, I posted the price I thought I could at least get outta them. This was just kind of a winter plan...but I will check it out