I had to go up 2 frame sizes from my old race bike. 56cm to 60cm. Stem is a 90 instead of a 110. Also changed the beautiful Nitto drop bar to a Dimension drop bar that has a shorter reach and is not round on the tops, but flattish for a broader and more comfortable platform for the palms to rest on.
Never used the drops when racing unless in a full tuck going down hill, still don't use the drops. Instead of a Pearl stem used on the old race bike I use a Technomics tall stem typically seen on touring bikes.
The old race bike was a Miyata Team model, the replacement is my brother's Raleigh Professional. Used 28mm tires up to 2 years ago and now use 25mm tires.