Guri Knudsdaughter, born 1849, emigrated 1866

I am wondering where Guri Knudsdaughter ended up in the USA. She was born in the parish of Vang in Valdres on April 18, 1849, and she left Norway on April 3, 1866, The first emigration-records here in Norway start in 1867, so I can't find the emigrant-protocols. So I would be very happy if I could get some help in finding her and possible descendants. Anne Brit in Oslo. [;)]