retrofitting older tail lights to newer car

[Rick Lindsay <rolindsay@yahoo.com>]

Quick question:  The '70 MGB changed to the more
blocky tail lights.  Is that change just the lens or
the entire assembly?  If the later, does the earlier
entire assembly fit the opening in the later fenders? 
I guess the question really is; Can one retrofit the
older body-contour-conforming tail lights to a '70 MGB
without modifying the fender openings?

rick