Axle hub housing

[73piglet]

Can someone help me identify what year this housing is? It’s on a 73 FJ55 but I have a feeling it’s a later model housing? As the wilwood rotor makes contact with the caliper bracket. While on the driver side it seats with plenty of clearance. I did have to replace the drivers side with a different housing(pre-76). Which makes me think it had different axle housings from the start.

 

[73piglet]

Clearance on drivers side

 

[73piglet]

Clearance of passenger side

 

[73piglet]

The only difference I can see is the drivers side studs are shorter(and flared slightly).

 

[73piglet]

Here’s another angle showing where the caliper and rotor make contact.

 

[B y r o n]

It doesn't appear that the rotor is seated square.