Somehow, I managed to loose the spring steel clip that attaches to the hood and into which the threaded wing-nut stud on the air breather door threads.
BTDT before and remember not being able to find one then. This clip is different from the 4 clips into which the 4 screws attaching the funnel to the hood attach. I did not loose these and, of course, they are readily available.
Anyone know where I might find one of these OEM style clips?