I have an 87 FZ700 and I want to put an 92 FZR600

single headlight upper fairing on it. I'm modifying my own stay bracket for the fairing and this is going to prove itself very difficult. Does anyone have any tips on jig rigging an upper fairing on a bike without mounting it to the forks? Any insight would kick a$*% I know its tough since you cant see what I'm talking about but if you have done this to your bike what is some info you would have liked to know prior to starting out.