I was beginning to take off the carburetor last night but noticed where the carburetor attaches to the intake there appears to be a separation between the intake pipe and where the carburetor attaches. It doesn't look like it is cracked but very clean as if someone sawed through it. Is it supposed to be this way? I would think this would allow air to get it from the outside and the carburetor to set to run to rich. I have looked an the manifolds offered as replacements and they appear to made differently. Will a replacement manifold fit with no modifications needed? Thanks in advance.