The Stovebolt Site Forums The Parking Lot Tons 'o Fun what the difference between a c30 and a c40 1957.

there is no such thing as a C30 or C40 in 57, the designation for a 55-59 3/4T is 3600 and the 1T is a 3800, as would be shown by the fender side emblems, and both 3600 and 3800 have 8 lugs with either 17.5 or 19.5 wheels depending on GVW .... the 5 lug wheels would be on a 1.5T [or larger], 4100, 4400 [or maybe 6100] - not as simple as "just remove and replace"

Bill