Ralph,
I'm not aware of anything on my 4.108 that has been glued on, but that doesn't mean it isn't so. I've found that there are many configurations on the 4.108 and mine is a 1987 model anyway (which could add more differences). I can't imagine that there were any glues available when your engine was built that would ever have lasted this long!
I'd be happy to help you find the answer. But, could you post a good photo, highlighting the specific location where anything has been attached by glue? Thanks.
Jack Webb