I just did the headlight switch on my 66 Imperial, along with the transmission shift indicator cable (not present on 64), plus replaced all dash bulbs with LED bulbs. I just got to where my arms have stopped bleeding and I can put on a shirt. One thing is certain when working on an Imperial, or any old MOPAR: When you put your hand behind the dash and feel around for what you need to do, your arms/hands/fingers will come back sliced up from contact with all those sharp pieces of metal back there.