I looked at all "MOSS" listings in Dearborn co and there weren't any Levi's listed.But I did find Harvey and Elizabeth listed in Ripley Co., IN 1850 census and they DO have a Levi that might be yours.
Harvey Moss51farmerb. MASS Elizabeth40b. N.Scotia Mary15b. IN John D14b. IN Rebecca J.12b. IN Nancy K.12b. IN Philander10b. IN Alpha M.8b. IN Edward5b. IN LEVI4b. IN Charlotte E.1b. IN
1860 Muscatine Co., IA census: Harvey Moss 61farmerb. MA Elizabeth S.50b. N.Scotia Rebecca J.22b. IN Philander N.20b. IN Altha M.18b. IN Edward M.16b. IN Levi S.14b. IN Charlotte11b. IN (can't read name) 9b. In Robert P. ? (can't read last name)13b. IN Patrick (can't read last name) 26farm laborb. Ireland
1870 Muscatine, IA census:(very hard to read) Harvey Moss 71b. MA Elizabeth60b. N. Scotia Charlotte20b. IN ?Thomas ?20b. Engl
Levi S. Moss24farmerb. IN Rebecca30b. MD William Mahaney?21farm laborb. MD
Here is the 1880 census for him in IA: Levi S. MOSSSelfMMaleW35INFarmerMANOVA SCOTIA Rebeca A. MOSSWifeMFemaleW37MDKeeping HouseMDMD Harvey E. MOSSSonSMaleW9IASchoolINMD Maggie A. MOSSDauSFemaleW7IASchoolINMD Minnie B. MOSSDauSFemaleW5IASchoolINMD Willie O. MOSSSonSMaleW2IAINMD Elizabeth MOSSMotherWFemaleW76NOVA SCOTIAENGNOVA SCOTIA