It's the 90s again! I'll cram all these questions into my main thread eventually. Here's a pic of my intermediate shaft. I've installed the new gear, haven't pressed the final cog back on yet, and you can see the original gear sitting beside the shaft. So now I need to either modify the shift fork or get a new one. I understand that they were all like this post 74'. Can I modify the shift fork I already have? Do I just need a new one? Can I just replace the damaged gear and get a replacement for or do the new dimensions mean I have to change other stuff? I've had a read on largaider.com and he mentions changing to 17.5 degree gears and totally ruined gearboxes but I'm not sure if he's talking about what's happened to my box or damage to the lay shaft.