The crossovers look like the ones in my 1979 models. I would not bother changing the capacitors unless they sound a little dull or recessed. That is, the sound should seem like it is coming from a little in front of the speakers. It your sound distant or reserved, use a good film and foil cap. They will not he inexpensive. Solen, in France, looks to make two different film and foil caps you should be able to purchase easily. There maybe others in Europe, too.