[1989GT]

You'll need the ECU also, now that I'm on that topic PATS is one thing you're going to have to figure out. I know you can have a dealer disable it so you can start the car or you could swap in the parts you need to make it work. Also the lightning used a returnless fuel system so you'll need different fuel rails so you can use your return style fuel system. Plan on getting that thing on a dyno and having a tuner work his magic. Also going to need some work done to your h/x-pipe. The good thing is you have the truck so things like powersteering/ AC should be easy for ya. The best thing I can say is read as much as you can about this project before you ever start. Here's a link to one of the modular swap forums.