Once the mount is unweighted the long bolt slips out from the bushing fairly easily. Now from what I hear, some years require the removal of the oil filter mount in order to remove the passenger side bolt. I had no such problem as shown in one of the pictures. I don't know which years have the problem and which ones don't, but for reference, mine is a '94. Now you are ready to install your motor mounts.
Installation is the reverse of the removal of the stock motor mounts.
When I ordered my motor mounts from Rusty he warned me that some years needed the shoulder to be clearanced slightly. Mine required this as shown in the pictures. In the side by side comparison of the new motor mount with the old motor mount you can see how the stock motor mount provides more clearance at the ends of the bushing. Quick pass with the drill fixed that problem. This is one of the best modifications I have done to my truck.