[Bobboloo]

If the car is for "street going" then the only thing I would consider would be higher compression pistons. I think that the T cams and ports are the ideal choice for a 2.4L street motor. I believe it was Road & Track that felt the same when they tested the T,E & S way back in 72' or so.

I personally wouldn't go for the bigger cams and ports unless they were accompanied with a displacement increase to offset the peakiness of the bigger cams.

You've got a great motor, I know because I have the same one in my 72'T. I love it.

Have you considered suspension, wheels and tires as a means of getting better performance? That might be the way to go for now.