Bronica focusing helicoid (75mm helicoid for zenzanon 100mm?)

Hello, I just found a cheap Zenzanon 100mm lens but do not have a focusing helicoid. However, I do have a Nikkor P 75mm f2.8 with its focusing helicoid, with "75mm" marked on it. Can I use this helicoid for my Zenzanon 100mm? Will it make the lens interfere with the mirror or anything?

Yes you can use this helicoid with the 100mm lens. This lens interferes with the mirror when the helicoid is fully retracted (infinity position), but only on the EC-series bodies.