ok...lets try to clear this all the way up.
The mounting points for the distributor is the same for 88-91 cylinder heads and the 96-00 cylinder heads.
The 92-95 cylinder head distributor mounting point is offset requiring some modification if not using the 92-95 distributor.
As previously mentioned, the distributor you need depends on the ecu you intend to run AND the head you intend to use.