Thanks for the feedback Pete. If I'm following your reply this would have 1/4" of the threshold sitting on the flooring. That doesn't seem like much, but maybe would be just fine.
I realized today what I ordered is not actually Bruce but Flexco (guessing it's very similar).
https://www.lowes.com/pd/FLEXCO-2-in-x- ... 1000026307Looking at the profile of the threshold, based on your reply I would expect the portion that will sit on the subfloor would be 1" if I'm leaving a 1-3/4" gap. The picture doesn't really make it look like that.
http://ajmlp.com/hardwoodflooring/forumimages/ThresholdProfile.PNGEven looking at the profile on the Bruce website link I shared doesn't look to be half of the width of the threshold. I may just have to wait for the special order to come in so I don't end up with too much or too little gap.
Thanks - Lance