new to forum

i just bought a 1998 mustang gt convertible, the exhaust is done and there is a cold air intake, as far as anything else i cant tell as this is the first mustang i have owned. i was curious what the stock quarter mile would be on this car and what i should do to change that. i have read so far pi heads are good, what kind of labour am i looking at?

i dont know if the gears are stock on the car but would like to find out. at about 75mph in 5th i am at about 2200rpm, does this sound stock.

thanks alot for the help