So we're going to have the metric number as the one generated by iso, and we want another field next to it that displays the imperial value. You can insert a field into the attribute/mtext and within that go to Field Category --> Objects --> Formula, then in the formula: box right click and add a field there, select the field that contains the metric value and you'll want to probably do by named object and contents or text or whatever. From there back in your formula you'll want to multiply that field by 3.281 to get your decimal version of imperial feet. If you want to play with getting it to display actual feet and inches you can play with the formatting and all that fun stuff, but this all should get you there.

George
If my post offers a solution, please click "Accept as Solution"