273 Numbers Matching car. Should I rebuild or swap engine?

I have a 1968 Dodge Dart GT. It has a 273 V8 which needs a rebuild. I considered an engine swap but since it is a numbers matching car with Air.... all original. Still has original paint but I am about to fix that as it's time! I am considering a rebuild on the V8. With only 190hp and a 2 barrel carb, I want a little more PUNCH. I don't want to race it, i just want a good daily driver that I can enjoy with some torque. And sure, i want to smoke the tires on occassion... I Googled and saw that Dodge or Plymouth had I think they called it a Super Commander at about 275HP. So... can I take my stock 273 V8 and give it the Super Commander spec... or at least similar performance? And can someone tell me what intake fits so I can swap over to a 4 barrel? Any other suggestions?