Leif Kruse's record

64.5m by Leif Kruse comes from this book:

https://vålehistorielag.no/uploads/1/2/4/9/124996694/re_minne_2018_web.pdf

"In a summary from 1936, the hill record is stated to be 54.5 metres, while at the same time the hill record at Holmenkollen was 52 metres. Later, the hill record at Krøglibakken was increased to 64.5 metres, set by Leif Kruse, Botne. It is safe to say that the hill was considered large at the time it was in use."

Hill record

I haven't yet found confirmation of Leif Kruse's jump of 64.5 m in 1946, so I'm guessing that may have been an error. He definitely stood at 64 m twice in competition on 16 March 1947, and it was mentioned in a newspaper as a hill record. Adolf Akerholdt's jump of 65 m was done in training on 11 January 1948. Kjell Stang (Norway) twice fell at 66 m in competition on 17 February 1946.