The book "Nature Photography" by Ingmar Holmasen shows a couple of different "tiltable back" (the author's term) modifications to Hasselblad bellows which the author has done. For one version, he uses a 150mm view camera lens. The other is for Hasselblad lenses. There are several copies of the book on eBay, and I suppose the online used book sellers also. My copy is the 1975 edition, although the later editions may also show the same "tiltable back".

Len