Yes your 89 car has the new cam

Your 87 has the old cam

Actually its the chart at page 3

On the old cams these flanges are aluminum and don't break off. But you can't fit an old flange to a new camshaft.

You can see what it looks like in the link I provided and yes its bolted to the end of the camshaft.

When you order a new one make sure its for the 1990+ models

Its not expensive.