How does the fuel tank reservoir / anti-slosh chamber function?, Refilling tank after draining old gas questions Options

[914rrr]

I just drained the old gas from my 75 1.8 L-Jet via the smaller return line. The PO replaced the fuel tank, the fuel filter and the fuel line sock / screen.

I'm guessing that some of the gas in the tank may be more than 3-5 years old and lost some / all of it's octane "mojo".

It didn't look or smell horrible but it did look a bit too "clear" if that is possibly a concern. I only emptied out maybe 1.5 gallons of gas.

After removing the gas cap and looking inside, it looked pretty clean with a small bit of gunk around the bottom of the fuel sock. I noticed what I'm guessing is a round gas tank reservoir / anti-slosh chamber for hard cornering and the fuel line sock / screen in the bottom of the tank.

This brought up a few questions:

what is the true function of this chamber?

are both supply and return fuel lines in the chamber?

how much fuel does the chamber hold?

from dead empty, how much fuel needs to be added to re-fill the chamber, or it that even a concern?

I have a 2 gallon gas can handy. Will 2 gallons be enough to get it started and drive to a gas station or should I add more before starting?

other than cycling the key a few times to get fuel to the pump, are there any other do's and don'ts for restarting a 75 1.8 L-Jet after the tank was drained?

Thanks in advance for your assistance.