im getting one from ebay. but does it come with a manual on how to hook it up to my particular car (86 NA gxl)? how difficult of an install is it?

 

well it should come with the wiring instructions, but if it doesn't you can go to apexi.com and get the wiring diagram from there, and the installation it's really simple i did my TII myself, you just have to follow the wiring diagram and you should be fine, when you finished be sure to double check your work, you dont wanna smoke your ecu.