I have run 4.10 for yrs (30) in a 416 sm blk been 20 miles to 2000 miles & just under 2700 RPM but i run a 32 tall tire, keeps it at the 2700 RPM . Just like to get out on the interstate or old country roads people don.t expect to see our old cars there. To me it,s all about the smiles per mile