Well, here is some photos of my Box with the 80mm and 90mm RC4WD shocks. I do agree Hwa224 that the manufactures must measure differently for some reason.Have a look of the 2 together (80mm on left and 90mm on right)...
...and the before, next to a stock Box, with the 80mm RC4WD units.
...and after with the 90mm RC4WD units.
As you can see, now the rear is a bit low, and I need to buy another pair of the 90mm RC4WD units. I only have 2 90mm shocks at the moment.
as for the wheels. This guy on eBay sells them.
They are very well made, and he shipped them immediately. Even though he is in Hong Kong, I got them in about a week. He makes them in silver as well. As well as looking damn nice, they are not too small, like the original Box wheels, so they fit nice and snug (no flopping tires).
The Junfac arms do not come with the axles installed. Getting them out of the plastic arms are easy. All I did was open up my bench vise to just a hair bigger then the axle itself, so just the plastic was supporting it, and tapped it with a hammer. You could also use a piece of tubing to do the same thing. Took me under a minute.