While removing the old tires from the rims (16") on my 109 I discovered that I have an odd-ball rim on the truck...all the rims are the same width but one of the 4 has less an offset than the other 3 by +/-3/4". I recently purchased a used rim from our host to be used as a spare but wouldn't ya know it matches the same offset as the odd-ball. Does anyone know what the correct rim offset should be for a '61 109"? Thanks