I hate to ask about this because I've spent some time searching trying to find the VIN on my truck, but I need help. Any suggestions from those that have Big Bolts on where I can find the VIN for my 1957 GMC F350 LCF?

Thanks for any input and sorry if this has been addressed somewhere else on the forums.
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57 GMC F350 Shortened WB 6' added 8' bed.