Fitting K&N filters to a small block engine

A while ago someone kindly told me what I needed to do to fit cone K&N air filters to the carbs on my Nevada 750 engine (2001). It involved removing the existing air box and fitting a Land Rover part but for the life of me I can’t find the original post. If you can help it would be much appreciated.

Mike Was it this thread?
If you go to your own account, you can search for your own posts.

That’s it!
Thanks very much Don