Personally, I prefer a leveling attachment attaching points to the rear one head and to the front of the other. It's not that I do not trust a carb plate, but you have greater leverage and movement.
And I have issues with using a carb plate with an aluminum intake. Iron fine..not aluminum.
Si Vis Pacem Parabellum
1967 Starlight black PMD Engineering 400 Auto 1968 Alpine Blue 400 4 speed 1968 Verdoro Green 400 HO 4 speed 2013 1LE 2SS/RS Inferno Orange Camaro.