273 upgrade to 4bbl?

Thank you everyone for the imputs! Keep them coming!

I know how to build FAST cars, I just don't need this one to be fast. All I want is a little more pep for a daily cruiser. I have just never had a 273 before. I have had some pretty bad 500" Mopar!

My 70 Belvedere 4-door 225 "3-on the tree" feels more responsive than the Dart (probably my imagination, but may be the stick shift)

I also have a 70 GTX 440 car that I am finishing up for when I feel like going faster.

I do have a background/job in race cars. I am crew chief for a 5 car NHRA drag race team. We run 3 SuperComp and 2 TopDragster. (6.10@234mph - 3.88 1/8 mile)

This Dart is currently just a nearly perfect car for me to use regularly as a driver. Nice enough to get looks, but not so nice I am afraid to drive it daily.

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Put one of those motors in the car and call it a day.