58 t-bird 9in in a duster

a friend of mine has a 68 dart, he recently sapped a 1958 t-bird 9in in it. ha clamis it was pretty much bolt it.

i currently am running an 8.25 with an auburn locker, id like to upgrade to an 8.75 or a 9in due to the 440 ill be installing in a few years. i cannot afford an 8.75.

he has a spare 58 t bird 9in that he will sell me for around $100 complete.

i been thinking about getting it and eventually building it and swapping it in my car. gears and lockers ill get cheap because my oss hass several good parts for them around his shop.

has anybody heard of this swap? i cant find anything on it. he claims it has the same with and een the perches are the same as Abody.

would this be a worthwhile swap if it fits? or should i spend big bucks on something else?

thanks