1987 - Anatomy of a cover - Uncanny X-Men #218

Thanks to Ferran Delgado for the heads up on this one! 

http://www.comicartfans.com/GalleryPiece.asp?Piece=1029664&GSub=145629

  

Here's another version by Adams, inked by Perez.

 

http://stormantic.com/3193/comics/storm-sunday-arthur-adams-part-vii

Here's the published version:

 

And here's a recent, recoloured version: