I'll add my .02 here. I have a 69 vert and did mine last fall. Type F fluid is what you want. I replaced my cylinders and hoses, not the pump. My passengers side was leaking which is why this all got started in the first place.
Once the cylinders and lines are replaced like how the originals were, I removed the rubber seal/gasket by using a small phyllips screw-driver to press into the little hole in the center and gently pulling the gasket out. If you don't do this it is real difficult to remove the gasket. I filled the cylinder with type F fluid. My wife helped me out with this next part.
You need to start with the top up BTW. With the car running, I had her put the top down using the power switch, I had my thumb covering the hole in the motor so fluid would not fly out. I might have had to help with my free hand to drop the top. Once down I had her try to raise the top. As I recall it didn't go up well at all the first time or two doing this. I had to again manually help the top out the first one to two times as the motor was very empty and there was no hydraulic assistance.
When the top is up, this is when you are checking the level, and adding accordingly. I used a small plastic measuring cup vs the baster. Whatever floats your boat will work. After the 2nd/3rd time of running it up and down it would go on it's own. Each time my thumb was covering the hole, and I could feel my thumb getting pulled into the hole during this down and up cycle, just a FYI. You can see the fluid running in the lines and there being less air as you go along.
You need to do this as many times as it takes for the fluid level to be just below the fill hole in the motor. If you run it up and down and there is more fluid to add to get it to that level, do so.
I hope this helps. It really was an easy fix. Best part for me was letting my wife know that she helped restore the Cougar with me, which she swore she would never do.

)
Last thing, when putting the rubber plug back in, I found it to go in very easy if the phyllips was used again to press into the center hole a little bit. It just went right in. If I pushed it without doing this I still might be trying to get it in.