Well, this man couldn't have naturalized earlier than 1884 (Naturalization needed at least 5 years residence in the U.S.) since he emigrated in 1879, and you didn't say when your person was born. However, his name fits.
Emibas was made from registrations in the Swedish parish to go to a foreign country. It is about 75% complete.
Söderlund, Magnus Peter Torparson = son of a tenant farmer. (unmarried man)
b. 6/7/1858 in Holm, Västernorrlands län (Medelpad)
Emigrated 6/1/1879 from Fagervik, Holm, Västernorrlands län (Medelpad) to New York, USA
Source: Household Examination Roll, p. 32
Emibas migration file ID: Holm Y 1879 003
Place of destination: New York Country of destination: USA