I replaced the rear shocks, but not the springs on my 1984 300D. The bottom bolts are easy. The top nuts require removing the rear seat. A good time to add seat covers (as me) or rebuild the seats. There is a little orange tab at the bottom of the seat bottoms that you push to release a catch. After the bottom is out, you can remove the seat-back. There are a few bolts, at the bottom I recall. One is behind the center arm rest.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans