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					Originally Posted by  bobdylan
					 
				 
				Is that the frame stamp, or door pillar? I would look at both. 
			
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 I think the consensus over time has been that it is rare for a GMC of the 60-66 variety to have a frame stamp.  Chevrolet is more common.
I've stripped out a few, had a few rolling frames, and cannot say I have seen a stamp on the frame that corresponds to the VIN.  I've seen it on '67 and newer more often.