Roadrace bike frames are usually built to have a 4" ( 100mm ) stem.
The steeper the head angle, the longer the stem should be to counteract the 'twitchiness' of the low rake and trail.
My Pug has a 73.5 deg head angle. I have a 5" stem, which makes steering more of a sideways shove than a twist round the headset.
Track bikes with 74 deg head angles have been known to have 6" stems. The Toptube is shortened to compensate and the front tyre almost touches the downtube. Even with such a twitchy head angle, trackstands are easy due to the bars moving sideways and not round.
Shorten the stem and the handling will change.