Don't forget 1210, 1310, and 1510!!! They all share the same sheet metal! The only difference is capacity. The 1010 is a "light"duty 1/2 ton (torsion bar front suspension), 1110 is a heavy duty 1/2 ton with a solid axle and leaf springs, 1210 is a 3/4 ton, 1310 is a 1 ton, 1510 is a 1&1/2 ton. The 1110 thru 1310 share the same frame, the only difference is the springs and axles. The 1010 has a boxed frame due to the torsion bars, and the 1510 has a frame similar to the lighter trucks, except it is a straight rail behind the cab.
Of course, that all went out the window in '74&5!