Hi Vince top sockets & top bows can be made in Auburn Calif. by Johns enterprises 545 Dairy road Auburn cal. Phone no 1 530 885-4956 Cell 530 401-7777 Hopes this helps Bert

Where Are You From? American canyon cal.

Vince, I checked the operation on my top irons which is the same as yours.
In your picture, the right arm rotates until it contacts the machined shoulder on the left arm preventing it from rotating further. This is a slight "overcenter" position built into the overall movement. Check to see if the right arm is registering all the way to the stop position on the left arm. If not, check all aspects of the top irons for complete travel.

Where Are You From? Texarkana, TX

Do You own a car built by Durant? Several plus 1