Urgent help needed!!!

[trikzlane]

i am getting a Exedy HD clutch for my 1983 Ke70 5 speed 4kc but wat i need to know is there are two kinds of clutchs, a 21 spline and 24 slpine, i need to know wat myn is or how can i tell or does anyone know the part number for the clutch
need help as my clutch is rooted and i need to order the new one SOON!!!

thanks mereki.