Porting your intake will get you some performance gains but it will be minor since your limited to the air and fuel you can get thru that 2 barrel carb. You might see better gains trying things like roller rockers arms and a freer flowing exhaust, a performance shift kit in your tranny, changing rear gears for better acceleration.
Man I feel for you guys in California, the smog laws really got ya'lls hands tied.
Goodluck, Charles