Carb for a 340?

Ok guys have a 73 Dart Sport 340. its got headers but other than that its pretty much stock. I have a Eddie 750 on it now thats just not running right and is a bear to start when it sits for more than a week straight..fuel just seems to run out of it or dry up or something as it takes a minute of cranking to get lit when it sits...i could go back a day or 2 later and it will start right back up...a week and its a minute of cranking to get it started...so im looking for a new Carb for it...any recommendations..I was thinking a Holley 650 may fit the bill? Ive looked at and debated the Holley 650,Edelbrock thunder series, and a original style TQ.