I think the wings are the same up to 1986 or 1988 can't remember, after then they had side repeaters. but overall the wings never really changed through the life of the MK1... All will fit even if slight modification is required.
Note that pretty much all mechanicals are interchangable but obviously anything to do with upper body is not, including all glass (bar the windscreen) and quite a bit of the interior. If you have anything more specific you wish to check will fit, ask away.
Awesome. Actually looking on a website at rear light it said golf mk1 and all cabby models so think the later shape would go on both 
Bulbs yes, rear lenses no.