Which spoiler?
 

I'm thinking of getting a 91 na with no wing.
Im thinking of buying the wings west flushmount rear wing spoiler.
has anybody put one on, if so was it hard?

here is a link to the spoiler
890126 - - 1990-1996 Nissan 300Zx Wrap Around Flushmount Spoiler No Light

Heh says intended for off road use only (whatever). I've never installed a wing before, but I have messed around with the third brake light panel. It's very flimsy and expensive so if it's in good shape take your time to take it off or you'll snap it. Try to slowly remove the whole panel as one rather than fully detaching each clip separately. Also, the clip holes on your hatch might not line up with the wing clips, so be ready to modify some stuff.