Hey I got a 87 quest n I'm upgrading it to a 88 ecu but can't find the ecu n wat do I need to change it

Hello plezz help me I got a 87 quest and I'm upgrading it to a 88 quest but don't know how to start or where the ecu is at plezz help me

What works and where to buy? Lookin' for regular ant.no power. Sly

Ok the biggest restriction on the car (stock) is the downpipe w/ cat (well there are plenty of other restrictive parts on these cars but if you want to turn the boost up a little this is a must!!!!) OK you will have to buy.......................TA DA, a header reducer (3 inch to 2&1/2) Guess what it bolts right to the back of the turbo, but you must grind it a little to squeeze by the little plate with 3 bolts in it (waste gate acess plate) do this and the next step would be to drill a hole