Well, The first thing you need in this conversion is at least one service manual. I have two because the wiring is diff in my 92 vs 91 1/2. Go figure. Anyway, the service maual says to ( I don't have it in front of me) put the key in and turn to run position and then push in at a small hole with a pucnh and out it pops. I will have to get my book to tell you exactly, but that is close. I had to use the key. A good lock smith can make one, but I think you can use the VIN from the truck it came from. Ask your dealer first. Get the locks from the doors of the same truck as the steering column. They are easier to get a key made from. Remember, you will have to buy all of the cly made for a 93 as they are double cut keys. not single cut like your 85