Retro fit SV 650 rear sets to 86 GSX-R frame?

New project for next season, an '86 GSX-R 750 frame.
I'm finding out the 88-92 stuff doesn't swap over like I initially thought.
The rear set mounts are different spacing, & on the 86 different between left & right. My garage measuring is 71 mm on the left (shift) & 91 mm on the right (brake).
I recall the 2d gen SV 650 has a similar setup, can someone measure theirs center to center for mounting bolts?
Or any other bike that may match up.
Thanks in advance!