I am re-building my 1983 90hp Johnson v-4 and am at the front of the motor. What I need to know is if someone knows whether or not there should be a gasket in between the carbs and the metal plate that mounts to them that is the airbox. And if anyone knows where I can get a diagram for the routing of the fuel vacuum hoses that that go to the carbs, there are 4 diaphrams that these hoses attach to and they all look the same but come from a differant part of the fuel system.Thanks in advance.