Looks like it could be what you need. Big tell is the round gasket face (where the differential meets the housing) and 10 bolt holes. The images below show the 4.57's from my 3600. You're looking for a set of 4.10s that look like this, just different number of teeth on the ring gear and pinion. Now, if it has a locker the internals won't look the same but the housing will.
