Get them Made
Far as I know you'll have to have a chip burned for your car. When I attended the 2000 GS Nats John at Caspers and Joe with Percision were burning chips. I got one street chip from each. If your going to keep the stock ECM ( which I'm still running ) you'll have to check with the burner of the one you what to go with and see if they'll do one for you unless you go with the one Caspers already has. The 86-87 cars run on more info than the 84-85 and you get off the shelf selection for them.