Jef Raskin wanted the Motorola 6809 ( http://www-sul.stanford.edu/mac/primary/docs/bom/jan80.html , and even earlier, http://www-sul.stanford.edu/mac/primary/docs/bom/macpoints.html).

This story from folklore sounds like what you are referring to:

http://folklore.org/StoryView.py?project=Macintosh&story=Apple_II_Mouse_Card.txt

Jef Raskin seems to claim a whole lot of inventions that seem more likely the result of many people's work. There's even been a little war of words between him and Bruce Horn that you can find traces of on the net in this regard. Nevertheless, although Raskin certainly blows his own trumpet with considerable vigour, he was an amazing individual and we have a lot to thank him for.