Edelbrock 1406 whistling

Ede 2176 (Manifold) + Ede 1406 (Carb) + Ede 9266 (Carb Gasket/Insulator).

This is the gasket/spacer I run on my cars. It is a Ede part, designed for Ede carbs.
Cools the carb nicely, and gives the right amount of hood clearance.