carb. crazzzzyness!!!!!!!!!

Hey guys, I got a 70' dart with a 440 that has been bored .030 with a mild cam and a Edelbrock performer RPM intake. The cam was described to me as being like one step over stock or a "RV" cam. I'm not super mechanically inclined when it comes to tuning engines and carbs. I currently have a Holley 650 dp carb. on the car and I just cant get it tuned for my type of driving. I love the carb. on the car and wish I could get it tuned for my type of driving but I don't race this car and unless i drive around with my foot on the floor boards which at that time it runs great i get a hesitation or lope when i drive it normal at pull outs. I also have a hard time keeping it running when its started cold for the first minute or so without me playing with the gas pedal. My question is to any of you carb. experts out there is if you could suggest a good carb. for this car to use as a Sunday driver. I've got advice from Summit Racing saying to use an Edelbrock performer 1407 750cfm. Then I talked to Jegs and they suggested Edelbrock performer 1405 600cfm. Then I called Edelbrock and their tech guy tells me to use a Edelbrock AVS Thunder series 1805 650cfm. You can see my situation here is one of total confusion and I've always got super advise from this web site so if anyone knows alot about what I'm trying to say here about my car please let me know what your thinking. Please no guessers cause I'm already confused enough lol. Thanks Dave