I'll say this, and take it for what it's worth...the guy giving you advice has probably never had his hands on one, let alone worked with it.
You can do what you want, but Edelbrock was wrong then and is wrong now.
Two 750's (it's well known here that I won't use anything with the Holley name on it but you can use a ProForm 750 and have something you can tune and FWIW you do NOT want carbs with a choke on them and you need something that has 4 corner idle) is what you need.
Edelbrock is in the same boat as Holley. They've been doing it wrong for so long they think they are correct.
If you can find an early 1980's Offenhauser catalog there is a good explanation of dual carb application sizing. And it's not what everyone says.
