The LD4b works almost as well as an LD340. Been a few that have swapped them on 340-360 headed engine and the difference was minimal at best. It's a great performing intake even if it is the small port window which as I've said countless times is the BIGGEST red herring BS in the SB mopar world.
Some of the other intakes that get recommended all the time have the same port window or smaller than an LD4b.
