I think that is one of the years that the tbird had a 5.0 HO in her.
Also there is plenty to swap over if you plan on doing a 2.3 to a 5.0 swap.
Almost best to have a donor car.
2014 V6 Deep Impact Blue Mustang, Borla Type S, 2.73 (Uughh need 3.73)
1989 Sonic Blue Mustang LX Coupe, 349 ci,
392 rwhp 424 rwtq....Mustang Dyno
"There are three kinds of men. The one that learns by reading. The few who learn by observation. The rest of them have to pee on the electric fence for themselves." -Will Rogers-