I have an 89 gtus and finally got my hands on a 13bt to install. Now my dilema is I have lots of parts to bet rid of. My 13b na has about 75000 since rebuild, and I have a 91 na motor that needs a rebuild. Also an automatic tranny off of a turbo engine. ECUs from na rx with wiring harness and throttle bodies, a 5 speed from a gtus too. I,m hoping the swap goes good, but if anybody has any advice let me know.