I have just recently acquired an 87 YJ with the V-6 motor, manual trans. It is currently completely gutted and the body has been removed. I have access to an 89 YJ with the 4 cylinder motor, also manual trans(if relevant) in it. My question is, can I pull the full heating system from the 89 and use it in my 87? I am not sure if there is a difference between systems on the different motors? I never saw the original one for the 87 so I don't know how to tell if it is possible or if I need to look into an electric heater before the winter. Thanks for any help!