Nicks Garage 383 build
When you’ve done enough to a 383 to make a big improvement in power from stock, the factory 301 intake is a pretty noticeable cork.
When I tested that on mine in 2002 I think it was like 35-40hp better with an RPM.
But I was already in the 420hp range with the stock intake(big SFT cam, headers, 10.6cr).