Zieleman (Smiley), your Allez Epic is beautiful... what an awesome score!!!
You're right about the '83 year being incorrect. Consider the fact that Mike Sinyard was moving away from tig-welding on the earliest Stumpjumpers to lugged frame design in '83 and Yoshi Konno (3Rensho) was building the high line Allez bikes that same year.
There is a good site devoted to identifying the differences between a Konno frame and other Allez frames:
http://vintage3rensholove.blogspot.c...sho-built.html