Update - no longer in need of the info or manual.

I have been looking for a shop manual for a '57 specifically and have came across two productions; Bishko and Dave Graham, just looking for advice as to which is better /more thorough and comprehensive. Any insights are greatly appreciated, also in the market for those who may be selling (have found a couple on ebay, however prefer to shop within this market.
If someone has a PDF version of the manual that they wouldn't mind sharing, that would also be appreciated.
.
Thank you and regards.
Gary M (conducting research prior to my 57 / 98 conv restoration this spring)