There is not much room for a distributor and a water connection to co-exist up there, so in that one way, the original Mercruiser water outlet had an advantage. I'm presently rejetting for lower fuel consumption and a quadrajet is really good in being able to get economy and power too, but I never could see the need for their gigantic secondaries. The only downside is that it is harder to set up. I decided to use an autolite 2100 instead as it is easier to set up and is excellent although it lacks the performance range of a quadrajet. the 4100 is also well regarded and I'm told it is easy to set up.