F100 dimension needed

Hi guys. The rubber bumpers that hold the rad support at the correct height on my truck seem to be gone. They are on the bottom of the U shaped support and sit on the frame to hold the support at the right height. Anyone have the height of them? It's a 56' if that makes a difference .Thanks in advance. Peter

 

I'm thinking they are 1/2 inch, try spacing it with washers first to test fit it. If it does not work take some out or add some in.