My recommendation is the Edelbrock pump #8844, a bit pricy, but the curved blade impellar will help the major problem with the Pantera cooling system, which is insufficient coolant flow.
The other "gotcha" is that by now most Pantera motors have had the wrong thermostat installed. The correct thermostat being a Robertshaw #333-180. They are available on-line from "Flow Kooler".
cowboy from hell
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