Im about to pull the setup out of the 80 lebaron,as long as the lower speedo cable fits im golden. I think even the older k-cars and sundance used the speedo cable setups.
80s Dakotas have the same cable ends as a 74 charger. My wife had an 87 and I used the speedo cable that goes from the unit to the dash off my 74 charger to fix hers.