Looking at part 39-084

The offset for the 'higher' bottom mounting hole on the 39-084 appears to be just under 7/8", while the offset for the lower hole is about 3/8". Keep in mind generally with these awning operators, matching the exact hole pattern, the spacing we list between those holes, and the style of the link arm is a reliable way of finding the replacement you need. So if those specifications on your old operator match the 39-084, then you should be good to go.