Excessive rear wheel "hop"

[Richard Wooldridge]

Hi all,
I don't know if you remember my '82 300D that I installed a 4.3L Astrovan V6 in? Well, I have a question for you! It's raining here in wet Washington, and I notice that when I depress the accelerator pedal too enthusiastically, the car "breaks loose", and I seem to get a lot of rear wheel hop, more than I remember last year, and more than when the pavement is dry. What are the various causes of this - do you think it needs shocks, or is it just the nature of the beast, or could the rear rubber mounts be getting worn, or what??
(Can't let those little Japanese roller skates get ahead of my "diesel" Merc! - HAH)
Thanks,
Richard Wooldridge
'82 300D/4.3L V6
Etc...