breather hose doesn't fit

In the process of doing some wiring I realized that the breather hose (crankcase air intake) does not fit properly, the 90 degree fitting is only 60% the size of the hole, and yet no fitting that I can find will adapt the hose to the right size. Is this something I need to be concerned about, should I rig it up or is there a correct part, and where can I find it?

Are you talking about in the inlet hose or the valve cover? If it is in the valve cover, you can get a grommet that will make it fit.

Look in a parts store in the help section for what you need they have various sizes.