Relatives in Farsund, Lista

Hi, I am looking for possible relatives and info on where my grandfather might have been born. He was Gunnar Knudsen Torp from Lista, Farsund Norway. This is in the Vanse region. I also wanted to try to find where the torp farm used to be in that area. His father was Teodor Knudsen Torp. Thanks for the help, -Mike