That is correct, 3600 for 3/4 and 3800 for 1 ton. It should be of note that the '56 spear is different form the '55, though they look similar. Besides having a different contour due to the different fender location (above the crease rather than below), it is also 2 peice. The number section is a separate part from the spear itself. I'm inclined to think that was to reduce manufacturing costs, as the spear part is the same on all models, only the number section is different.
