I have a allmotor gsr setup and I am gonna send the head to get done but I don't know if I should do ITB's or should I keep my skunk2 intake manifold jg 65mm throttlebody and get it ported to match the head?

 

If you drive it everyday and dont make insane comp. just stick with the S2. The ITB's will improve throttle response and power, but you sacrifice driveability. Have the manifold matched and you will be happy with the results not only in performance but the way the car behaves daily. It wont bog, hesitate, or loose power like ITB's will do on a mild comp motor.

 

is 11.5:1 c/r ok for ITB's? i head they use alot of gas and with gas prices goin up

 

You should see the best gains with the manifold over the ITB's. THE ITB's will yield more power, but its the driveability that is affected. DO you want to sacrifice more power for less everyday drving comfort? And as far as gas mileage goes, you should ask someone who drives them daily or frequently, i have only driven with them on a car at the track.