Passenger lists from france to america

[Qwackers]

hi , I am looking for a passenger Francois alcouffe , on a liner to america . One of my Husbands french ancestors , says that Francois was in america when he was 20 as a locksmith , when he was called up for rrecruitment in the RODEZ army Aveyron . I've looked at a few passenger lists but as yet haven't found him . I do not know how old he would have been when he travelled . But he was born in 1875'in Villefranche de Rouergue . I have found a few other Passengers with the same surname but as yet not him . They seem to have emigrated to California . Any help with this search would be gratefully received.thanks