1998 Mustang Cobra Engine Work Question?

[98mustangcobra]

Hello I have a 1998 Mustang Cobra. I Threw A Rod. So i am getting New Forged Pistons that hold 1000+ Hp , H-Beam Rods that hold 1200+ HP , and Crank that is good for 1000+ HP.

First of all I would like to know if and if so how much Horsepower would adding this most likely give me?

Secondly does anybody have any suggestions of anything else that is a good Horsepower gain that i should do while my engine is apart?

How much Horsepower does Porting and pollishing your heads give you? And Cost?

Lastly Should i get a high performance Fuel Pump or Fuel Injectors?

It would really help me greatly if i could get all these questions answered and get told a close amount of horsepower each thing should give me. Thanks for your time i hope to hear back and have a great day.