A body 73 and up vs 72 and older front track width questions.

The Wilwoods still widen the front, although they say it's only .20, so a hair under a quarter inch.
I'm gonna bet that if the tires touched at rest with the factory discs, they'll still touch with the Wilwoods as the suspension cycles.
For less than the cost of the Wilwood kit and the extra parts and hassles involved, you could have just gotten wheels with the correct offset.
But it's your dime. Hope it works out the way you hope.