65 Dart Wagon Conversion to a Sedan Delivery

Hey,
Is your O/D button a momentary switch or a "click on, click off" style. Only asking because I'm going to need to do the same for my A518

it’s a click on click off switch. I will wire it so it’s on all the time like my Dakota. Click it once and it will come out of LU and OD. Click again and back into LU and OD