If you decide not to use the Ford "auto-bleed" - keeping the tube in place would still be good for any possible future upgrades of the cooling system.
I run a configuration like this:
But the changes above (which require sealing off the top of the swirl tank, and installing bungs in the expansion tank) may be more than you want to take on right now.
Anyway - the upper left corner (looking from the rear of the car) of the radiator is where the port for either a petcock, or the tube is - at least it was on my car.
On my car, I had a petcock for the "manual" air bleed before I did the mod.
And of course Larry's suggestion on just using water until you are confident in your cooling system is the right one - you will probably save yourself money in anti-freeze, it may be easier if there is a mess to clean up, and if you have a squeejee, you can get some of the grime of your garage floor!
(In a worst case scenario - which I hope you don't encounter).
Rocky
PS> I'm not used to be refered to as "Dear Rocky", but that's nice!
I am only Rocky because that is the name of my Land Cruiser, and I am "Rocky" on all the internet forums I join. My real name is Chuck - but not the distinguished Dr. Chuck Engles.
