I understand what you will be going through, if you are going to replace the clutch and driveline. I just did that on my 1200. My 3 pin flex driver looked about like yours. Yes, the release lever has one elongated hole. Here is a pic of a good release lever, and my broken 3 pin driver. I had no idea of the amount of things that got destroyed by having wore out iso mounts, but didnt take long to find out once I started digging. I was keeping my 1200 though, so I was ok with spending the money on the parts, you may not want to if you are trying to sell it. The fine folks here answered alot of my questions and gave good advice on different mods and things to check/replace. What kind of condition are the rest of the drivline parts in? Thanks, TB