The 230/250/292 thrust plate looks similar to the 216/235 plate, but it's a different thickness. I believe it's a little thicker and won't allow the gear to be pressed on far enough without tightening up. I can see nothing wrong with reusing the thrust plate and spacer, if you can get the assembly apart without breaking the plate. In a few decades of working on these engines, I don't recall ever finding a measureable amount of wear on a thrust plate. I've seen a lot of them broken by people trying to remove the gear from the cam. It's possible to face a few thousandths off the 250 plate and make it work on a 235, but it requires a magnetic chuck and a tool post grinder on a lathe, or a similar setup with a surface grinder.
Jerry
