Hey guys I have a 1963 Chrysler 300, 383 4-speed. Ok so I want to purchase a new edelbrock performer rpm intake manifold. So I have a 383 block with 440 heads they are casting # 346. The intake manifold is casting # 3830848 dated march 1976 it’s a factory 4 barrel manifold. So my question is do I buy a manifold for a 383 or a 440??