Doesn't look like that is going to work without leaks. Not sure how they resurfaced the mating surfaces but they need to resurface the mating surfaces using a mill that gets them flat. It almost looks like they took a 4" grinding wheel to it by hand. Sometimes the bolt area on those flanges tends to bow out a bit. You can sometimes heat them up with a torch and hit them with a hammer a bit to (gradually) flatten them back out but then after you do that, you'll ideally want to have them resurfaced on a mill that gets the entire surface flat.