Just to add to that, I had a Valiant Charger back in the 90's that had a Cain alloy intake manifold that was not attached to the exhaust manifold (hotspots they were called, which prevented the intake from freezing) and had a 4 barrel carby. Great while cruising down the hi-way, gave some good power, but when you got back into traffic, drove like a dog, 'cause the fuel was icing up in the intake. Took a good 15 minutes for the manifold (big, long curved runners on it) to warm up enough to vaporise the fuel. Cross flow engines, have to rely on this sort of system to do the job.