Put a vacuum gauge on it and look for steady vs. bouncy needle at idle.
Check for vacuum leaks at the carb base and between manifolds and head.
Adjust the valves - 'quiet' valves could be too tight.
Check for broken springs and engine sludge content while you have the cover off.
Take the carb off, disassemble, soak, reassemble with a kit.
If it sat that much there could be varnish plugging up internal passages.
'According to the PO' doesn't always hold any weight - assume nothing.
Besides, with modern fuel blends, it doesn't take long at all.
Did you check for sticking advance weights while replacing the points?
Give it a little more base timing for extra pep.
Collect parts for your choice of electronic ignition upgrade.
This is by no means an exhaustive list, but it should keep you busy for a while.
These kind of projects make a good study course in themselves.
It gives you a good chance to learn how things work, making you a better mechanic and a better driver.
Welcome to the slanted world!
