In this tech article HOT ROD shows you how to hop-up a Chevy 350 engine equipped ... at least 15 to 16 inches of idle vacuum is ... The marine port-injection intake manifold accepts the stock ...

For many years the aftermarket intake manifold has been ... especially for the more popular engines like the 350 Chevy, ... here is the dual-port configuration of the Offy Dual Port manifold.

Nicky Fowler and his staff at Scoggin-Dickey in Lubbock, Texas, put on their thinking caps and machined a new and unique intake manifold to mate the Vortec heads to the tuned-port 350.