if they are stock length they might work since 87-88 uses a tad bit shorter shock. otherwise they will probably lower you. really depends on what weight they are sprung for also.
sounds like a great deal though as long as they're not blown to smithereens.
They probs wont need to be revalved there fairly new, but i got a raptor 350 but that shouldnt make a diffrence got to be then stock probly get some +2 a amrs to go with it