i was running with a 465 holley felt good and strong but i was told that you can get carter carbs and that they are better because they spray a finner spray of fuel. this guy reckons it would be good for my car 250 x-flow. so i was wondering what sizes are around and basicly if they stay tuned or if you have to adjust every weekend. i am after a good four barrel at the moment so any advise will be taken on. thanx Aaron