I went over to LMC at lunch today, and their heater core was wrong too. The guy punched up the reasons people returned them on his computer, and "DIDN'T FIT" was on the list like 100 times. Whoever the manufacturer of this heater core is must have something labeled wrong in their catalogs or something, because it sure won't work in a '63 truck with the Deluxe heater. :rolleyes: