I was wondering if anyone could identify the plane my great grandfather (Francis W. Reed) is standing in front of? The picture was probably taken in Indiana.
There's not much information about this exact aircraft, but the same type features in a great article about The First Black Airmen to Fly Across America. It turns out there is at least one A-4 still flying - NC6927 - which you can see being flown in a short video about one of those aviators, James Banning.
Eaglerock A-4 (source) - note the deep sides for the forward cockpit, which you can see in your picture.
Eaglerock A-3 (source) - although a different engine, this angle helps makes sense of the struts in your picture.