Chris,
I have been researching rotors as well and from what I have found is that while the F350 rotor is more shallow, it also mounts behind the hub vice over the hub. So you may not gain any space, just measure your hub to see if the f350 rotor will slip over the hub.

1966 Chevrolet Caprice 2 Door Hardtop (396 Big Block)
1951 GMC 9434 5 Window (waiting on a 292 transplant)