It seems that the only to see inch marks in AS is to use Engineering or Arch unit types. We use decimal type which has no unit associated with it. In Autocad, we simply add an inch mark to the suffix in the dimstyle. However AS completely ignores the Suffix of dimstyles (except for alt units weirdly enough). I have to create a new dimension request and use the Label to type in "%DimVal"" to get it to work. This might be an acceptable workaround except that if I use ordinate dimensions the label is completely ignored by AS.
This seems like an easy task.