I've tested many carbs on my Dart lately both 4150's and Dommy's and recently did an 1150 for an 8-second 3400 lb pump gas BB Chevelle and that carb hands down out performs my 1050. Smoother, cleaner and wfo is sick and that's WITH no power valves so like we all say, give it what it wants and I'm going to build an 1150 for myself and sell the 1050.........Now, the bigger 4150's 950+ cfm are super snappy down low but can't even touch the 1050's in the mid and top end...........This is on the street and not the track but after owning driving and racing my Dart since the early 90's, I think it will translate to a new best here soon before our local 1/8th mile track closes the doors for good..........