what make/type of PS Pump do i have

1966 Valiant Slant 6.
what make or type PS Pump do i have because there are 3 different "repair kits" available: Chrysler
Saginaw
Gates
My 67 service manual shows it to be a 1.2 pump; but no name, and that does not show on any repair kit. mine does have that hex nut on the pulley. (big nut....LIKE ME!!!)
stay safe
thanks
G&U

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