My information could be a little outdated (big surprise), but the only Edelbrock multiple carb maifold I show for the BBC is a dual quad intake.

With my intrest in tri-powers, I have kind of looked for aftermarket BBC units over the years and only units I have ever come across are the factory Corvette units which are pretty rare and very pricey.

If you have an Edelbrock part# or a manufature of any aftermarket unit for the BBC could you please post it here?