[WadmalawJoe]

I just did the gravity bleeding about a month ago.
I connected a clear tube to the bleeder valve and ran it into a can with a inch or two of brake fluid in it, so that it couldn't suck air back in.
I cracked the bleeder valves
pumped the brakes a few times
added new brake fluid to the master
and repeated until I had a nice flow of fluid with no bubbles
closed bleeders
topped off master
took it for a test drive around the farm, all was well.
It took about 20 minutes (the bleeding)
I had replaced wheel cylinders and about half of the hard lines, which is why I think it went smoothly. When I had disconnected the lines they were full of junk/muddy looking stuff.