I posted a while back about this garage sale find. It didn't seem to fit me at all, but I have since done a bunch of playing around with saddle-seat post-stem-handlebar position and found that the bike now fits perfectly.
It's a short wheel base criterium bike, so it has razor sharp handling. It's one of those bikes that fits so well, it just becomes an extension of yourself

What is most eye-opening are the 165mm crank arms. Have always ridden 170mm. Should've have been on 165's all along.
The Dura-Ace 7401 Gruppo is impressive (this coming from a life-long Campy junkie). This was Shimano's first (I think) shot at indexed shifting and the shifts are very crisp. Interesting getting used to downtube shifters again!
Reynold's 531 Professional tubing - very light. Traced the build to 1986-87.