There are several numbers that need to be defined: Part Numbers. Assigned to a part in order to be cataloged and sold. If the part is superceded by an improved version then the part number is changed to reflect the new applications. Part numbers do not appear on the parts themselves. Engineering numbers. Assigned during the design proces and appear molded or printed on the part. To add confusion the engineering number follows the same format as the part number. Trying to find or order a part using the engineering number will not work. I know of no AMC cross reference between engineering to part number reference books (Ford has one). Aftermarket suppliers will reference engineering numbers in their parts catalogs on some specific application parts such as EGR valves. Casting numbers. Much like engineering numbers. Cast into a part but are not linked to the part number. The confusion is over time people have confused part and engineering numbers. The cast number appears on the part itself. Part numbers are the number used to order the part which will have the casting number on it when it arrives. Bill Strobel Fayetteville, NC 1967 Rebel SST 1969 SC/Rambler 1972 Hornet Sportabout 1976 Matador Brougham AMCRC. AMCWC, AMO, NAMDRA _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list