Not sure to be honest all of them were plugged with screw driversWhich ones?
Only a very few are actually necessary to run.
73's have some vacuum lines that go up to modules on the firewall.
Those can be plugged at one or both ends for testing and/or permanently if necessary.
Power brake and timing advance are all you really "need".
...and those are even not 100% necessary just to run.
There's also the charcoal can, with the big line going to the carb accelerator pump.
That can also be plugged for testing.