Tried to do overhaul keeping old crank and 7-speed top mount thumb shifters but was having difficult time finding chain rings to match bolt spacing and for a little more money decided to just go all new.
The new stuff works great but does muddy old school theme.
The frame is 21" I believe...Cannondale was using a small, medium and large designation then instead of inches though.
Bike does ride great, perfect for upstate New York, USA.
Thanks for the posts and the compliments on the beast.
For true blue old school ride see my 1983 Miyata posting