There were several other mods done at around the same time, so yes AN/ALE 40 but also the old domed red anti coll lights were replaced by the inverted V high intensity strobes. Also ( come on Bob ) the seats should have gone from 9B2 to 9B3 ( bigger headbox ) and possibly the 1148 tailcone mod where the drop down type replaced the noddy cap
By the time I joined in 85, most were 1A's, but I was on the mods team that did the last upgrade at Abingdon where they added one after 'the line' had closed, and it got all those mentioned ( XZ381 )