Well if it was primarily street driven you would be happier with a smaller carb.
I have had a 600, 670, 725 and 750 on my 360. The Demon 725 was all together too much carb and was never happy below 2000 rpm. The 750 Holley was better and if I never had any other carb on it I would likely say it was good. The 750 and 725 gave about the same performance above 4500 rpm but the driveability below that was no where near as good as the 600 or 670.
The 600 was a great carb for a street driven vehicle but it did have less power above 4500 rpm compared to the 725 or 750. The 670 has as good driveability down low as the 600 and gives up nothing to the two bigger carbs up top.
My 360 is no slouch, it is making approx 370HP and has run a best of 13.7 @ 102 with the 600 cfm carb. Its not the carb that is keeping it from being faster as the miserable 2.2 second 60' time I had with the 13.7 run.
An added bonus the two smaller carbs also give my about 5 mpg more than the bigger ones.
Remember a 360 turning 6000 rpm at 100% volumetric efficiency can only move 625 cfm of air. And no engine short of a pro-stock or Sprint Cup engine is 100% efficient so the air needs are less. So going real big on the carb isn't going to by you anything and will impact the driveability at the low rpms.