Nice haul of parts/cars!
Regarding the two Cougar2/Storm truck chassis - both i'm guessing are the same length (in terms of the red metal chassis part itself) its just the swept front wishbones on the buggy chassis that gives it the shorter wheelbase.... its nice to have the roller drive shafts on that car too
Another vote here on the Viscous drive being for the Cougar/Fireblade 2000 series of buggies or trucks.
Would be cool to see what else you have & hear what plans you have with it all (rebuild, race, shelf etc)