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depends on the pump manufacturer. trw or thompson. a search here will yield your answer. does not matter if 6 cyl or v-8.
The one I found is a TRW. Did San Jose use TRW at that time? It took forever so I will probably use it anyway but if San Jose only used Thompson at the time I would probably paint it teal instead of black. Much closer than the V8 pump on there now, Even though it does have a correct pulley I put on in years ago and still have the v8 pulley sitting in a box.