all eight fit but, one likes to bind a little on the battery and reciever box. That can be fixed by taking out the screw on the back end of the battery box and grinding it down all the way flush to the edge of the box. Then take a 2 1/2" bolt a nut and a couple of washers and drill a hole as far back as possible (mine is a bit less then a 1/4" from the end of the box) on the battery box.
Buying bigger screws about 3*20 mm or somwhere around that area will also help then you can use the spacers included, but it will work with all of the included parts no extras needed.

edit: These shocks will withstand the biggest jumps, this is good, but you tend to bounce around a bit more because it is so stiff. You can just use four shocks and add some of the provided spacers if you want a little smoother ride.