If your '86 is stock and has the wire plug stuck into the back of the carb, then you need the stepper motor/ feed back carb. If you have doubts, call those folks up at the carb place with the tag number. It is the little metal thing on the top of the carb with one of the screws through it. That will assure you that you get the right one for your application. Is the carb too worn out to rebuild? The kits for a BBD is around $20.00 and it is not too difficult a chore. The best thing to do if you decide to rebuild your own carb is not to get in a hurry. Mike Romain, who posts here quite often is a Carter BBD guru, and is great for advice.
Good luck and God bless.
Jon In Tucson
Jeremiah 17:7 "But blessed is the man who trusts in the Lord, whose confidence in Him."
"The secret to a Jeep, especially a CJ, is you can't
panic." - Mike
"I may not be a smart man, Jenny, but I do know grounds."