A friend of mine is doing a restore with all pre 63 parts. My question is, what year was the first drop axle made for the F1 series trucks, hopefully pre 63?

 

iffin you mean that little inch drop bout' the center of the axle foot & 1/2 long or so first ones i'm seein are in 60, least the 60 frame i'm currently using has one.
mikie
near ottawa canada
58 merc panel, 64 econoline p/u