Welcome!
Lots of helpful people and information on this forum to help you through your new acquisition.
BTW, the 74Tii did not have any smog stuff orginally. If there's K&N filter on there, most likely that the original airbox was removed. Those are very good and expensive - so if seller still has it, see if your brother can pick it up.
Post some pics.
Not sure what cables you are referring to. The Tii used mechanical linkage for the throttle. Download the K-fisher manual, make your self some of the tools need to tune it (or buy the tools).
Byas