My W2 Econo heads cracked right by where the W2 was cast on the outside part of the head under the exhaust port. Both heads leaked water out the crack. It was a shame because they ran easy 9's in my Duster with a little port work I did and stock 2.02 valves. The heads are still leaning against the wall in my shop but after that happened I sold off 2 sets of rockers and a W2 intake that I ported.