It's fine for the streets to be winding and the street network varied.
(in this case, to be is repeated in both clauses so it's okay to omit to be in second clause)
It's fine for the streets to wind and the street network varied.
(But, when first infinitive is active and second is passive, can I still omit to be?
I feel I should put be before varied )
Waiting for your professional advice. Thank you.