It would be prudent to have another set of intake gaskets handy if pulling the intake manifold again.  If the installed gaskets had any kind of gasket sealer on them, the gaskets will likely not be reusable and will need to be replaced.  If put on dry, the gaskets may or may not come back off cleanly.
 
The umbrella being referred to is the ‘Automatic Choke Air Deflector Mushroom’ and these are available from Macs Auto Parts as well as other vendors.  Keep in mind that if the choke air tube going through the intake manifold is damaged or compromised in any way, there will be an exhaust leak at either one of both sides of the intake manifold unless those ports are blocked.
 

https://www.macsautoparts.com/ford_mercury_late/automatic-choke-air-intake-deflector-mushroom-292-v8-ford.html

Lorena, Texas (South of Waco)

Just my 2 cents on this thread.  I have several Y-block engines and anytime I remove the intake manifold from one that any age, I replace that tube.  I found that most will last for decades before leaking.  If you are ever going back to stock, you can put the tube in and forget it.  The replacement of the tube is a 5 minute job if the intake is off the engine and you can always go back to a stock system.  If you tap and thread this area with plugs, you now have likely ruined the intake for any stock use.