Your pickup was assembled in Long Beach. The Long Beach assembly plant had a pressed steel department, it was the only assembly point besides the Rouge to press their own steel.Assembly plant managers had autonomy and worked directly with dealers, variances in assembly, especially when the steel was pressed there is likely as there was no overriding hard and set rules besides the basics for the assembly plants, managers had leeway to meet production demands...so if a right well fender was overrun, it was mixed into production.its really no simpler than that.I've been reading these:
http://cdm15889.contentdm.oclc.org/c...on/p15889coll2
it gives a fascinating look into the guys who did it...in their own words.