How many splines should my drive shafts have its a 90 e reg first reg 30 10 87 engine is pre tdi deisol turbo. Or where is the easiest way to count them

They should be depending on engine 10 spline at the diff end and 24 at the drive member. Cv's vary depending on what LR fancied at the time. If you remove a rear drive shaft 5 17mm or 13mm bolts and remove the drive flange and shaft and count the number at the diff end.