[rotorwrench]

The 8BA type pump has it's own pressure relief valve. The early engines like the prewar V8s and post war 59 series (C69 also in Canada) had the pressure relief valve just above the front of the cam in the tappet galley. The oil bypassed for pressure relief sort of squirts out into the timing chest where it lubricates the gears. An 8BA pump will fit but then the engine will have two relief valves. I would stick with the 59 series pump myself.