I have cucuzza seed, too. The first six I scarified the seed, and soaked it for 30 hours-so far nada. The next batch, I soaked for 72 hours-so far nada.
Meanwhile, the Trombonicino squash I planted at the same time are already out in their pemanent home.
I only soaked mine for 12 hours (slightly warm water to start). They went from floating to not floating so I figured they’d soaked long enough. I think I’ll try again and soak them longer and maybe I’ll get lucky.
A blog described Tromboncino as “seriously Jack and the Beanstalk” big .... I laughed when I read it, but the two in cups are looking as if they’d like to start climbing if something was available. I’ll probably put them out in the garden next weekend.