Be carefull.  IIRC both the high and low Imp injectors show the same part # on the side.  You can tell them apart by the connector.  The High Imp injectors have an offset "key" and the low Imp have a centered key.  Your 88 should have High imp. injectors.  Also, I don't think you can get an "injector cleaning kit" although, I could be wrong.  If you wanted to clean them yourself you would probably have to let them soak in a vat of carb cleaner or something overnight.  Then you would be left trying to source the pintle caps, grommets, filter baskets, & O-rings.  I would wind up costing you more to get the parts than it would if you sent them out to be cleaned. (I looked when I went through this)
