I didn't have a Bundt pan, but I found a conversion chart on allrecipes that said a 13x9 would hold it. It didn't. I filled the cake pan 1/2 way, and had enough batter left to make 12 small cupcakes (not mini-cupcakes).

Cook time was just over 40 minutes for the cake. About 18 minutes for the cupcakes.

I used 1/2 the cinnamon that the recipe called for, and I will do as you did and w/ the 4x sugar.

I grated the zucchini by hand (that's some serious work).