Found a video for Ka24E rebuild online, not a lot of seed but its moving at least!
How to Rebuild SOHC KA24E Nissan 240SX engines (download torrent) - TPB
To the best of my knowledge it is not pirated or anything like that. There was no copyright information in the video itself... it just looks to be a home made movie some mechanic guy made.
(sorry if these kind of links are disallowed, I will remove it if requested)