no point in wondering over paperwork, look at the truck and it'll tell you what it is
if you check the truck itself and find the same numbers as on the title, you can remain confused and find a way to figure it out - if you check the truck and find a different number, especially on the frame as Vaughn mentions, then you can figure someone came up w/ a 64 title for the 66 truck that didn't have one - or maybe it was stolen
Bill