Yeah I do have some cars to play with. I was considering the XE268 for mine and I even contacted Comp Cams filled out the paperwork for a full on cam selection help and they got back to me saying 268. After getting that I had been working on the car more and found out my gears were 3.23's instead of 3.55's also started to take into account the weight of myself and my wife in the car and when looking at the profiles of the to cams the little more torque makes sense.
You have a lighter car and the 3.91 gears the 268 should make some great power! What are you doing for intake/exhaust etc.? I have a 400 for each of the other cars as well and since neither are number matching they will definately get some added goodies.