you can boost an ITR just be carefull not to go over 9psi to be safe.

As Baby J said , they can be kinda picky. ITR has 2 things working against it:

1) Higher than normal compression
2) Weak Ringlands compared to GSR an LS

SO keep the boost down, and under 250whp.

Full race kits are nice, but for what you can do on a stock motor, a little overkill IMO.

Id go with Treadstone Performance Kit or build a custom kit.