Hi Carlo nice to meet you. Ok, i was under the impression that the water was there to take some of the heat away from the exaust due to it being cast as one peice. But I'm only new to this, so please bear with me.

I was hoping that i could set up the carbs like the true tri-power systems from the 60's, with only the middle carb with the vacume advance and the two other carbs with no idle circuits. So this way it would idle with manners on one carb and give a bit more go when driving. Currently I have a single barrel stromberg on it of on old holden and the way it is positioned on the stock manifold is diffenrt to the triple manifold. If I could send you some photos of the manifold could pick your brain some more?