Drive Train Axles Bearings problem
2005 Ford Mustang V8 Two Wheel Drive Manual 65000 miles

I was wonder do i need a new fly wheel for a horse power up-grade from 315 to 375. I'm going to order a new clutch kit as well, but don't what is the best choice. Also, When i start the car it makes this clicking noise once warm, and when the clutch is pressed it stops. I not sure what it is but im guessing the clutch/flywheel system needs repair or replacement.