I am in need of a new manifold for my 5.7 crusader. I am having trouble finding the part, crusader part number 7151100. I can't not source this part anywhere. Most shops tell me its to old and they don't handle parts for this engine. It runs great, just has some rust and I would like to change it before it gets any worse. If anyone could please help me locate on or an aftermarket it would be greatly appreciated.