Here are several of different views of Intakes. Note the lack of a water inlet on the 351C, 351M and 400C engines. Although it is difficult to tell from the pictures, the 351M/400 are wider than the 351C intakes because of the taller deck height. The last photo is an Aussie intake that accommodates a 4 barrel carburetor yet fits the 2V heads. Also note that it fits a spread-bore (Rochester) carb.