I have had and used a bunch of different Holley 1050 CFM Dominators for single four barrel bracket motors over the years, some worked good and some didn't I have a pair of Holley List 9375 now on a BB Indy tunnel ram that I'm looking to use soon, one of them has had some mods done to it before I bought it so I recently bought another one hoping it is stock so I can use the two stock ones on the manifold I'm going to do some engine dyno testing soon on single dominator intake manifold so I wll test all three of them one the same motor the same day to see the AFR results One needed one jet size differents to get the same AFR in past testing Thanks for the help