Here is what Dave Ungar says he did on the project (among other things): http://www.linkedin.com/in/davidungar
His thesis is online at ftp://sunsite.berkeley.edu/pub/techreps/CSD-86-287.html
It also got turned into a book: http://www.amazon.com/Evaluation-Performance-Smalltalk-Distinguished-Dissert...
Here is some criticism of his results: http://www.cs.cmu.edu/afs/cs/project/ai-repository/ai/lang/lisp/txt/garbage/...
I like his thesis very much, but there is certainly room to argue with the conclusions, if for nothing else than that the world has changed in the last 20 years.
-Ralph