Here is my porgress
Starting with a 2001 250
Cut the back off the shock mount/fender mount to make room
I had to grind a little off of the very TOP of the shock as well.
I had to make the spring as lose as I could to rotate it by hand so it didn't interfere with the swing arm.
I used a dremel to enlarge the bolt holes since the stock ones were larger than the ZX6 bolts, I found that using a grinding stone didn't work, the stones just flew apart or wore out too quickly (went through several) so I used a metal cutting bit and just wipped it around the inside, it made it kind of messy so then I went back with the grinding stones and polished it up. It took a long time and was a major pita.
The color scheme of the bike is going to be flat black and neon green, so the shock got a paint job, after it's dry it will be re-masked and the spring will be neon green. It's just rattle can work, this is a track bike so it doesn't have to be awesome, just functional and cheap.