My bro had a 92 400, he had a double din custom installed. he had the the wires har installed (no harness) and a mounting harness custom made (not too hard, just a couple of plates and screws. not too hard of a DIY). but you are right, i don't think there is an install kit, but its not too hard. just test which wires go where (if you don't know how, just take two wires, and connect them to a power source BRIEFLY, and you will hear the speaker "pop" - not blow pop, but turn on pop.). Let me know if you have any problems.