Won't start

Sorry, I thought afterwards that what I said might be misleading. I'm using new studs from when I swapped out the gasket, and a new nut. I reused the existing doughnut washer or whatever it is. The front and back studs use the same doughnut shaped washer. It's a little hard to see in the photo, but that whitish residue is around the stud area.
manifold.jpg
-JP