1997 GSXR 750 front end and swingarm swap on a 1977 kz650-b1

hey guys and gals, i know the taboo of bringing up old posts but i need help. ive got a 1977 kz650-b1 that i recently bought for 600$ runs and rides fine. i have the ability to acquire a COMPLETE 1997 gsxr 750 parts bike from my work so wheels, brakes, swingarm, front end, rear sets and such will all be accounted for. But my problem lies with the stem swap situation. I understand grinding/pressing out the GSXR stem and pressing in the kz650 stem into the GSXR lower tree, but what modifications to the TOP GSXR tree will i need to do to make the GSXR top tree accept the kz650 stem? any information is much appreciated!!!! and yes im going monoshock using the GSXR rear suspension.

a bushing needs to be machined out and installed,like in the pics i posted of some zxtriples i did for boostable,

hth,

leon