Has anyone swapped a Holley in place of an Edelbrock on a 340?

Inertia said
... There's no good reason that carb shouldn't work, - but I regularly pick up a 3310, 780/750 Holley at a swap meet for $50 ish, kit it, adjust it to my spec, and have it sitting on the shelf waiting for the next spirited driver with a Carter/Eddy, - offer to let them try my Holley free of charge, and I'll put his old carb back on for no-charge if he's not happy.

Never put an Eddy back on, donated lotsa Eddys to charity.

True story several times over.

Good luck.

I've done the opposite. I used to loan out a Factory Hp 440 AVS 750cfm to people with Holleys that could not get them tuned right, or keep it tuned. After running the AVS for a few days they would come back raving about the Carter. Same for a TQ. I/they threw a lot of Holleys in the trash. I finally got my friend to ditch his Holleys on his street cars, after his brothers' 55 Chevy caught on fire from the Holley carb and ruined the front half of the car