I am roasting a cut up turkey, how long and at what temp should I cook the breast meat and the dark meat (I'm doing them in separate ovens)?

Hi Sari! You can use the same temperature as if they were all together. Just remember to keep checking the temperatures—here's a guide: https://food52.com/blog/11646-the-essential-numbers-a-guide-to-times-and-temps-for-cooking-your-bird

A little extra info here: https://food52.com/hotline/30052-we-are-cooking-out-turkey-with-the-legs-cut-off-how-long-would-you-cook-the-dark-meat-and-white-mea