which kit did you buy?  all the other gaskets are the same.  the counterbalancer seal is the only other seal thats different from 87 to 88-90.  some of the seal kits come with both seals for the counterbalancer. 

i've used them before, same as a moose kit.  should be nine seals, or 10 if it includes the 87 counterbalancer seal.  in that pic it almost looks like it has the 87 seal, that one with the large od and small id. 

if anything you just have to buy 1 seal