I do have an article published on my blog. Unfortunately the copied magazine is in Dutch. It's mostly about Willy Felber himself and his creations. See blog: Ferrari 400: Ferrari 365 GTC/4 Beach Car by Felber ? for sale ? Only 1 piece produced
Felber located near Geneva made it, I saw it as a boy with my dad in the Geneva show in 76, 77 or 78, we went onto the stand and looked at it closely, I remember thinking how unusual it was for a Ferrari even though I had little clue back then. MS
You might find this an useful article as well: Ferrari 365 GTC/4 Beach Car by Felber ? Banovsky's Car of the Day