Brakes

Modern brake stirrups are much more rigid than older designs.
Dual pivot front calipers are a vast improvement over sidpull designs.
Rear brakes do not need anywhere near the same leverage and hence are not critical, hence Campagnolo supply sidepull stirrups which reduce skidding and weight.
Check brake block to fixing bolt depth. Measure vertically with a ruler and ensure the new brake has enough adjustment.