273 Carb Questions/recommendations

Looking for carb recommendations for my 273. Motor was rebuilt a few years ago, nothing radical, just warmed up a bit. Car is currently getting the frame replaced and when it come back I will be upgrading to electronic ignition and I am thinking about a new carb.

I see there is an edelbrock 1403 that is 500 cfm. Anyone with experience with this? Any other suggestions?