what differential is this? e6s-wba

[feifong]

i bought one a while ago from a junkyard with reardisc on it not sure what its off of. Heres the numbers that were on it anyone have a site to check what came off of what. E6S-WBA The guy at the jy said it was off a 90 stang.

 

[Mustang5L5]

Gonna need pics. '90 Mustang didn't come with rear disks so it's modified. Will need pics to tell what setup it's using