e36 flywheel clutch

Are the E36 flywheels all the same size or are there 228 and 240 ones? My 328i is obviously running a 240 clutch but bought this M50 solid flywheel kit with a 228 Sachs clutch in it so I'm wondering if I need to just get a 240 clutch or need a 240 flywheel as well? Or ultimately just use the...