He also didn't tap and plug the 2 coolant ports on the manifold with allen screws - these fed the old carbs choke. If you don't tap and seal them off, they can over time start to leak coolant either into the intake or all over the side of the block. Most install manuals for these carbs leave that out - mine from when I installed the weber on Geronimo in 1983 came with the screws and stressed this point.