carb problems?

The car has had a problem hesitating and stalling if you do not keep the pedal in the same position when she is not completely warmed up.

Now after sitting for about seven months, we took her out on the hiway and she did okay until I got on the off ramp. She stalled on me, and then would start up fine, until I put it in drive, it would not die, just idle rough. Then I push the gas and she would die right away.

She did that four about five minutes, and then all of a sudden she was driving fine. After that I did not go above 45mph and she was fine again.

Am I right in assuming the carb needs a rebuild?

thanks for any advice you can give to get this car back to running smooth.