There are 2 plates with those pumps....The internal housing plate, which should be a close fit to the pump vane tips And the divider plate, which should fit midway along the length of the vanes. The divider plate takes the flow from the vanes and splits it to each bank of the block. With these 8 bolt pumps, the manual does not show sleeves between it and the block. The pump sucks in coolant from the center hole in the internal housing plate, which is why there should be minimum clearance between it and the pump vanes.
Check the thread in the heating/cooling forum titled "chalk up one more for the cast impeller..........." a lot of reading there....
George
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"...out to my ol'55, I pulled away slowly, feeling so holy, god knows i was feeling alive"....written by Tom Wait from the Eagles' Live From The Forum
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