>>14698011. Slam saddle back to get more weight over the rear wheel since old rigid mtb chainstays are longer
2. Choose an undersized frame to the top time isn't too long
3. Keep the flat bars and install bullhorns or accept a cockpit like pic related with floppy steering.
Most drop bar conversions on rigid are set up badly and are only suited for people who are all torso. Depends on the frame though. Some old mtb frames with lots of stack are nearly road geom
