Preheat your oven to 350 degrees, and spray a loaf pan.
Cream your sugars, oil, butter, eggs, and vanilla in a mixer.
Stir in your dry ingredients until just combined. Do not overmix.
Add zuchinni, stirring until just combined. Stir in 3/4 c of chocolate chips.
Pour into your prepared loaf pan, and sprinkle with the remaining chocolate chips.
Bake for 50-60 minutes, or until a toothpick inserted in the center comes out clean.
Cool in the pan 15 minutes, then remove onto a wire rack to cool.