Dual quad question

Hey guys, I am putting together a dual quad tunnel ram setup for my 67 barracuda. It has a 440, bored 0.030" over during the rebuild, with stock iron heads that have been well ported and have some slight bowl work, a .488"/.498" lift 298/303 duration (224/234 @ 0.050") cam and has a 10:1 compression ratio. It's not a 600hp engine, but it gets down just fine. I have 2 questions: would it be better to run a pair of 600 cfm carbs or would a pair of 750 cfm carbs be way too much? Also, would an 1850-3 holley work with a 9834-2? Both being vacuum secondary, electric choke 600 cfm holleys, and can be jetted the same, but i have no experience in this particular matter and i have one of each so it would save me money. I also have a 3310-3 750 cfm that i could match up with another if 750 wouldn't be too much. Thank you for your expertise and insight!