97 zx900 front and rear swap on 85 gpz 750

Hi I searched the chassis posts but couldn't find where anyone had done this. My concerns on the frontend are the length of the fork. in the rear my concern is width, offset, and shock placement and linkage mounting. I also need to know the width of the 85 gpz frame at the swing arm pivot. As I do not have the bike in front of me. Thank you for any info.

I changed my mind about the zx900r swingarm as the shock is offset. If the forks are close in length I'm gonna go ahead and get them. I need some help though. I need to know the width of the pivot on the 1985 gpz 750. I do not have mine here. its out of state. please help as i have a line on another swingarm combo. Thanks in advance