This was originally conceived as a poster for Marvelmania (Marvel's fan club before FOOM). As far as I know the poster was never published by Marvelmania. Steranko included a clear black and white version of the art in the Supergraphics publication Steranko Portfolio One in 1970. Skip ahead to a couple of years ago when a Steranko fan asked me for a high-res scan of the drawing. He then took the drawing and remastered it. He then coloured it with Steranko providing him colour guide suggestions. The result was posted here: http://www.thedrawingsofsteranko.com/spiderman_ting.html
Great bit of info - Thanks, Tony!
Your comments are very welcome!