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1FD = FoMoCo USA incomplete Ford vehicle.
N = Class 6, 19,501-26,000 lbs. Gross Vehicle Weight Rating range.
K74 = F700 (diesel) Cab & Chassis.
C = Cummins model FD-1060 5.9L (359 cid) I-6 diesel.
7 = Check digit, FoMoCo use only.
P = 1993.
V = Kentucky Truck Assembly Plant.
A33812 = 1993 Numerical Sequence of Assembly, the trucks specific serial number.