Carb tuning question

[tourings10style]

I just put a new solid lifter cam in my s10 pro-touring project and here are the specs....
Int Exh
455 481 Lift
316 323 Duration at 0
243 254 Duration at 0.050

I am running a 600 Edelbrock 600 performer carb. It seems to be needing more gas when I drop it in gear and try to idle. In neutral and idling it runs great. I was just wondering for a little insight as to what metering rod and spring size you fellas think I should use. Right now it is just the original set-up. I thought about buying the kit with the different sizes but in order to save time and money if you guys may have a suggestion that would be greatly appreciated!

[rockvillespeed]

you're either severely overcammed or undercarbed, to start.
depending on the rest of your engine combo, that is a real long cam for a street small block.
post more info.