Too much heat

Yes I am talking about the exhaust heat crossover in the intake manifold. The car was my dads he bought it new here in my home town of Louisville ,Ohio I restored it to 100% original, and what an undertaking, but its done, Will try to post a picture ( if I can figure this uploading all out ), Well I am just wondering if those two spots are too hot for powder coating, Cuda chick says its good for 5 to 600 degrees. Would those two spots get that hot ???