"1970 Pro Touring Dart Build"

Not for that particular wheel. But yes machined down Wilwood Hubs to fit in the past. What is your center opening on the wheel and whats your hub diameter? Most 1 piece cast wheels are hub centric and being able to open up the center and still stay round and be hub centric to the wilwood hub would be almost impossible to chuck the wheel up and machine.
You dont need to machine the whole snout just further up toward the face of the hub.