Really? Edelbrock/Holley

Folks need to read the rest of those threads.
Just like Holley 4150/60 and Dominators (and all the new ones based on them), there are some Edelbrocks that need a bit of rework so all the parts work together.
When they don't have the right length booster, or there are restrictions where there shouldn't be, they don't work as well as they should. All fixable items. No worse than what you find in other popular carbs...