Talking with Tom Langdon, he said the Carter Weber carbs are off of an engine that was originally 100 cid so 2 of them running on the primary side should roughly be the same carburetion as the stock 235 had with secondaries in reserve. I have heard the argument that the dual carbs actually gives better fuel distribution compared to single stock carb. You will hear some claim of a mileage increase with multiple carbs but I never checked mileage before or afterwards to be able to comment myself.
