I picked up an Ellis Dual Power intake for my 54 GMC 630-50 awhile back. It fits the 426/503 GMC 6s and uses 2 SAE #3 single bbl carbs - shown in the picture with adapters for Stromberg 97 type mount.
Does anyone have any experience with these or other aftermarket intakes for big trucks? Do they add any power?
http://s1061.photobucket.com/user/abhadurihauck/media/IMG_0201_zpsca960aac.jpg.html
