I appreciate the replies.
As I understand, replacing the oil pan involves removing the exhaust header and moving the sway bar, looks like a PITA, too much to do in my carport. Oil pans of this vintage can be really hard to remove and clean up for gasket replacement.
I did receive a Eco-Plug, it's a magnetic threadless and headless plug: you slide it in like a champagne cork and a heavy duty rare earth magnet holds it in place.
I was thinking of a quick draining valve, like a Fumoto or something similar. Some of the reviews on the Fumoto say they leak; so JB welding in place may raise another set of problems.