2bbl with headers?

My dart runs a 225 with twin barrel carb, headers and electronic ignition. This was all installed by the previous owner who said when he made the changes the difference over stock was quite surprising. The intake is from an Aussie VC Valiant. I have had to play around with the mixture screws at idle and it runs real nice and smooth. I have access t656285562 -1982o two different dual carb setups which I may try at some stage.