I have a couple of zenith carbs that were on a cast iron "siamese" manifold on a different car. I was wondering if they will work ok on an SU aluminum manifold. The reason i ask is that as far as i can tell, the zenith carbs rely on richening the mixture for initial start (choke) on only one of the two carbs. This is probably ok on the siamese manifold were the intakes from both carbs were mixed at low RPM. But the mixing on the aluminum manifold looks only incidental. Has anyone tried this and have any experience to report?

dean