For the two Cougars, only one is an actual Cougar 2. The one on the right is a Schumacher Storm truck, that's why it has those shock mounts and the Cougar 1 front wishbones.
Viscous drive could be for anything, Schumacher made layshafts to fit it in all the competition 2wd buggies available at the time. Most likely to be the Cougar 2000 though, considering all the other bits.
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