The Floyd kit didn't come with the specs for the locking nut? Is it a real Floyd (rip your nut out and replace it with the locking nut style) or is it a Kahler style (nut remains and the locking nut goes on the headstock)?

Either way the kit should have come with installation instructions. Floyd style locking nuts are a fairly invasive install, with bolts going right through the neck usually. So make sure you have it all sorted out before you start anything.