the 5 speed single mass kits for your car won't fit if you go 6 speed mate. they use a 228mm clutch.
you;'ll need the clutch and flywheel setup from a 6 speed car, which uses a 240mm clutch with a different slave cylinder arrangement also.
You'll also need the driveshafts, starter motor, clutch hydro line, and power steering pipe from the 6 speed car, as well as possibly a speedo drive plug depending on the age of yours, and possibly the whole shifter mech and cables too, again depending on the age of your AGU.