When I come to a stop and put in the clutch sometimes my 1998 GT will stall, it will start right back up, any advice?

 

Well theres alot of different reasons, But have you added any CAI systems to the car? I know SOME cars are fussy with the K&N CAI, some need the Screen put back in even though they recommend taking them out.
You can clean the TPS Throttle position sensor.

 

Thanks, yes it has a steeda CAI on it. I didn't put in on it was there when I brought it. I have already done a cleaning kit on it and it didn't help. I am not sure which screen you are referring to. I will check on the TPS.

Thanks for the help!

 

Have it scanned for DTCs... I reccomend Any Mustang OBDll owner purchase a Code Reader. They are relatively inexspensive and a must for Diagnosing Driveability concerns correctly. You can pick up a decent code reader for 50-60$...Without scanning,were all just guessing! That being said it does sound like a common issue with either the MAF or IAC... Good Luck!