Day in, day out, for most performance applications a 750 Holley is the right carb for the Cleveland, from mild to wild. Demon carbs are flowed wet & the numbers tend to run about 100cfm lower for an equivalent carb.
Vacuum secondary or double pumper matters not, what you need is the carb set up for your engine. If you buy a new Holley, it will still not run well out of the box.
George
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.