I hope you do realize that 'od -x' does reverse the bytes when used on a little endian system. Just create a file that only contains two letter, e.g. first 'a' and then 'b'. Now look at the file with 'od -x' and you will find (at least if you're on a little endian system) 0000000 6261 i.e. the 'b' seems to come first and only then the 'a'.
