Les Ames best average of 58.57 is against New Zealand. However, against Australia it is less than half that at 27.00.
Therefore, Prior and Knott seem better choices to me as the former is probably a better batsman, and the latter an equivalent batsman, but better keeper.
Just a thought......
1945-1977 ATG Draft: Desmond Haynes - Roy Fredericks - Rohan Kanhai - Neil Harvey - Clive Lloyd - Asif Iqbal - John Waite - Ray Lindwall - Garth McKenzie - John Snow - Derek Underwood
ATG XI: Jack Hobbs - Len Hutton - Don Bradman - Brian Lara - Graham Pollock - Gary Sobers - Alan Knott - Malcolm Marshall - Shane Warne - Dennis Lillee- Sydney Barnes