Above instructions for top-mount of shock. Yes for bottom mount you can do:
1. narrow bushing on knuckle to width of shock clevis
2. use bushing-inside-of-bushing to fit shock clevis to factory bushing. Should be 12.7mm OD and 10mm ID. Just wide enough to tightly fit tightly inside clevis and factory bushing. This sleeve should fit inside factory bushing. Ream ID out to 10mm with length for tight fit on clevis on shock (slightly narrower than narrowed factory bushing so all clamping-pressure goes onto knuckle bushing).
This sleeve radially locates and centre GSX-R 10mm bolt inside of factory knuckle bushing once that's been narrowed to fit inside shock clevis. Lateral location is provided by narrowed factory knuckle bushing. Once bolt is fitted with minimal play, tightening it locks everything in place. Rotation is done by factory bushing inside of knuckle.
https://www.zoro.com/bunting-bearing...12/i/G4189586/
No hacking frame needed!