Chevy 350 no start condition after parked for a while | Fuel supply?

This is a video of me troubleshooting a no start after having the truck parked for a couple of months. This could be due to anything! Luckily these old trucks are easier to work on, comparatively.
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[@oldmanoldtruck]

Happy birthday! Mine was yesterday!

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Happy birthday to you! @oldmanoldtruck