The Edelbrock should be a lot less trouble once it's set up.
As long as you don't have to deal with temperature or barometric swings on a regular basis, the Holley can work fairly well. The folks I know that run double pumpers put variable jet metering block setups in to simplify tuning for variations across a day at the track. These can make excellent track carburetors for wild builds. These are builds with big cams, lot's of compression, and racing exhaust systems on very light cars.
I highly recommend getting your compression up in the 9:1 range to use a 4 bbl if you haven't already done so. Anything at or below 8:1 isn't going to be very satisfying.
My original '74 8:1 motor with a 390 Holley ran slower than mid to late 60's 1 bbl cars. 
I'd take a reman Edelbrock in a heart beat. They are simple enough that most of the reman places can't even screw them up. You can get "Reconditioned by Edelbrock" unit for decent money, and it will be right.
They are relatively inexpensive from Summit. Take a look at the 500 cfm Edelbrock. It's hard to beat with the factory jetting and metering rods. Bump the metering rod springs up to the stiffest ones available, reduce the pump shot, and your golden.
It will be more forgiving of lower compression as well.CJ