[ImperialCrown]

Welcome to Allpar. Any fault codes? Any diagnostics so far?
Several things could cause this, fuel and ignition-related among them.
You may want to post this topic in Ram Trucks down the page, or it may get moved there by a moderator.

 

[chuzz]

If it's sucking air, then you need to find out where. I'd check the carburetor mounting gasket first and then the intake manifold.