Ok, thanks for clarifying the differences between the two vehicles regarding type of tachs, mechanical vs. electric, but what I was really after was how to dismount the electric tach from the instrument panel. I wasn't clear that I don't think the tachs are the same, I was asking if their mounting systems were the same. But perhaps not.
Your point about the rubber gasket between the bezel and the face of the instrument panel is helpful and I'll do some very gentle prying around the circumference of the bezel.
The tach tracks increasing RPM correctly, but upon deceleration/reducing RPMs, the needle sticks and requires a slight tap on the glass for it to drop to the correct position. In talking with the instrument rebuilder, they agree it isn't likely a problem with the electronics, but rather a dirty or worn mechanism so the fix shouldn't be too difficult....for them.
Thanks.