Woog,
The pictures show a radiator with a fill cap at the top driver side.
The top hose connects on the PS.
The bottom hose connects on the DS.
I had a FORD radiator like that.
My Chevy Harrison radiator for a the L6 is tall and narrow and the top hose is on the DS.
The bottom hose is on the PS.
The fill cap is off center to the PS.
The 1960-66 C10 trucks with a V8 had a short wide radiator that rested in saddles mounted on the upper rail of the frame crossmember. The L6 engines had the tall narrow radiators.
Jay