1969 power steering pumps do not directly interchange. Some are variable ratio; some are not. Chevy Tech info warned against mixing components:
“The pump used on vehicles with variable ratio power steering provides increased fluid flow at higher pressure than the conventional pump. Consequently, the conventional pump and the pump used with the variable ratio system are not interchangeable. A new pump outlet hose is required on variable ratio power steering equipped cars.”
All 1969 Camaros with power steering were variable ratio. Don't know of a Camaro application that used a dual pulley.
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