66 273 Cam and Intake Thoughts

Hello,
I have the original 273 in my 1966 Dart. It is a 2 bbl car. The original heads were recently (13k miles ago) cleaned up and had hardened valve seats so it would run unleaded gas (as I was told by the original owner). The engine has 85k original miles on it, and runs well. I am looking for cam/ intake carb build up ideas.

I have a set of Spitfire headers that I am thinking about running with a true 2.5" dual exhaust. I do have a 4bbl (thermoquad) and a factory 4bbl intake off of a 1974 360. I also have access to an Edelbrock Carb (650 cfm).

My goal is to give the car more power, and an aggressive sound. It will not be a racer, but I do want to have some fun with it. I will keep all of the factory parts so I can replace them if the need arises.

So, should I run the 74 factory intake and carb?
Should I buy an aftermarket intake and run the Edelbrock?
What Cam should I run with the aforementioned set up?

And the magical question...any ideas on how much hp this set up with make?

I really appreciate your insight and wisdom. This is a great community!!!

Thanks,
Clint
San Gabriel (Los Angeles, CA)

1966 Dodge Dart 270 V8
1964 Dodge Dart GT /6 - Soon to have 360/727