reinstalling the steering wheel on an 87 5ktq

[George Tur]

My son was working on his 5ktq this afternoon, replacing the ignition switch, 
and after putting the steering wheel back on we noticed that the horn didn't 
work any more. A check of the steering wheel shows that the steering wheel is 
not seated on the steering shaft as deeply as it was before. We tried pushing 
it on as hard as we can and we've torqued the nut on pretty tight, but the 
steering wheel is still about a quarter inch further out then it was before. 
Is there some trick to getting the steering wheel seated all the way down on 
the shaft, like a specific torque setting, or a big rubber maller?

George Tur
91 V8