Spec 24102-G
From a really great Monogram Modeling book on markings, the wing insignia was 3/4 of the Available Chord, with the available chord being from the leading edge to the wing/aileron line. Spanwise, it was located 1/8th of the span from the tip. For the fuselage, the size of the insignia was 3/4 fuselage height, at a point half way between the trailing edge of the wing, and leading edge of horizontal stab.
This ought to get you pretty close.