Nice Newport. You have at least a couple GM components in that Chrysler - the motors for the wing windows - if they are power - ("butterfly windows") would be GM units. They sometimes work in my past experience - never really all that predictable.
The factory carb on that model was a Holley 2210. They run well when they run well, but when they don't run well, it is often hard to get them to run well again. Typical Holley problem of warping castings as even the rebuilt ones are hit and miss. In my experience with the 73 400 engine with that 2 bbl carb, the 4 bbl carbs when added do not feel much better than those Holleys when they run well.
Some upholstery work and a vinyl top and you should be styling soon. How many miles on it?