Time for a new Carb

Hi all,
I have a 1969 Dart GT with a 340 and leaky Holley 3310-2 on an old Torker 340 manifold with a '68 4 speed cam and Rhodes lifters and a 727 automatic and 3:23 gears. The Holley is fairly worn out, the throttle shafts have lots of play and a corner of base plate has been repaired with epoxy 30 some years ago. Somehow the secondary fuel bowl drains into into the intake manifold after a week or so. Not good.. Although it runs well, I think this carb is a bit big for this engine and it is tired.
So this is what I am considering for options:
1: Rebuild the Holley AGAIN and see if i can get the leaking to stop. May have to repair corrosion on the gasket faces?? not sure where the leak is.
2: I just picked up a free Carter AFB B-6 9625S that may have come off of a GM. It needs to be cleaned and rebuilt. May also need throttle adapter purchase. not sure on that one yet.
3: Purchase a Holley 600cfm 4160 from Classic Ind H1850 ~$310.00.
4: Purchase an Edelbrock 600cfm Performer series from Classic Ind E1405 for ~$315.00
The intended use of our Dart is cruising and trouble free reliability. I have a couple of teen age boys who like to drive it occasionally and it needs to be turn key and go. I'd like to spend less than $500.00. Not really interested in fuel injection either.

What are everyone's thoughts? Any other suggestions are welcome. I'v done a ton of reading and from what I can gather it's Holley for flexibility and Edelbrock for set it and forget it reliability. or am I wrong on that one?

Andy