Once the handle and crank are removed, use something flat (a plastic kitchen spatula for example) to pop the 20-odd tabs that hold the door panel in place. On 1973 and later, the armrest is bolted to the door frame and has to be removed, but before this ('72 and earlier) it simply lifts up. The rear quarter panels come out the same way, but then make sure to remove the flip-out ashtray (if yours is equipped with one).