Right, here goes, think this is right...
Smoked rear lights were standard on all gti's
The wheels on the first car were fitted to 8 & 16v's after a ceratin year (around M reg i think)
Before that, 8v's had a different wheel again (not sure what they are)
16v's before that had the wheels on the 2nd picture.
So basically i'd stick the 5 spoke wheels on the 16v and the long beach wheels (9spoke) on the 8v.
Hope that helps