Fumblin',
Here's the VIN for my '54 3100: 54J004173

Here's the VIN for th '63 C20: 3C254J123427

Both #s came off the manufacturer's plates mounted on the driver's side of the cab. (If these aren't what you need, let me know and I'll try again.)

Good luck, and good work! Thanks for sharing.
K

~ Kimberly
My '54 ... and my '63 and a '59 F100