The P/N's for the M38 fuel sending unit does not match the M561's P/N, at least in my parts manuals.
The 715's brake shoe lining kit does match up and so does the instrument cluster for the 151.
Of corse, we all know about the standard M series things like lights, guages and such.
It would be nice to know what the etc,etc's are though. Things useful like U joints, tie rod ends, A frame bushings, and other "wear out" parts. If anyone knows of of things like that, I for one would like to know. I was simply attempting to inform about things I found out by accident and compairing with the other vehicles I own.