It is a sealed system from the factory and the replacement is also a sealed system that is pre-bled. I really hate having to tell you this, but by trying to bleed this unit, you have inadvertantly blown the internal seals in the clutch master cylinder and at this point need to replace the entire unit.
The hydraulic linkage system is serviced as an assembly only. No maintenance is required. The individual components that form the system cannot be overhauled or serviced separately. The cylinders and connecting lines are sealed units. Bleeding or flushing is not required.
Fluid level will increase as the clutch wears. A level ring is provided on the reservoir. Level should not be above the ring. If it is, suspect an unacceptable amount of clutch wear.
NOTE Verify that the cap on the clutch master cylinder reservoir is tight so that fluid will not spill during removal.
NOTE Do NOT remove the plastic shipping stop from the pushrod until the slave cylinder has been installed.
Fig. Hydraulic clutch components
Take the parts back to O'Reilley's and tell them that they are not right, that this is a sealed combined unit. No need to go to dealer for the parts. Napa, Carquest, Bumper2Bumper all carry the correct combined sealed unit you need.
I dont know why some aftermarket manufacturers make them separately, when they know that it has to be sealed unit. I have seen this problem on some Ford trucks as well that require a sealed combined unit.
You didnt do anything wrong. I blame this first on manufacturers for making them and also on the parts people for not paying more attention and selling you the correct part instead of just trying to get the sell and sell whatever they happen to stock
You get the right part, it will be a breeze compared to what you have tried to accomplish at this point.