The emblems on the 1 1/2 and 2 tons are a little bigger, it appears they are about the same length and height but are a little wider at the top. I have not found anywhere that reproduces these yet. There is a place in, B.C. Canada that might. Their website shows many NOS parts but I called on this and found out they are actually made in China. I have no idea if this is the right one for the bigger trucks or not. I am also looking for a new emblem for my 52 6400 with no success so far. I checked with Paul's Chrome plating in Penn and was quoted $500 to replate it! I took pictures some months back of the one off my 2 ton compared to one on a 51 3/4 ton I have out back of the garage. You can see the difference in the 2nd picture.
Emblem from 52 6400 compared to emblem on 51 3/4 ton
Top view showing difference between the two


52 6400
50 3600
69 Ford LTD