Hey 89tsi20g I just did a AEM system plug and play in a 93 lexus SC 300 that we struffed a 2JZ TT in it we pulled from a 96 Supra we built a few years back that put 502 to the ground. That system is Awsome But I must say it is way advanced and has many features that we would never utilize in the Quest for the money I think unless you run a Automatic wich we are planning to do in the 89 we are going to build this summer for next year. I Would suggest of course the Haltech fore your Quest ( Obviously because I sell them ) but I really think for the money the E6K is the best bang for the buck for the Quest. But If you can afford the AEM PEM'S go for the bells and whistles cause it is the BOMB for sure. If you do decide to go with AEM I can Get the system for You because I do tuning for a local shop "IMPORT SPORTS" that is a AEM dealer and we have been trained on the system. So let me no if you go either Haltech or AEM PEM's I can Help. And That goes fopr Everyone else also.
Bill Dermota
Fuel Injection Specialties.
http://users.starpower.net/mtech