The vin on the radiator core support only has 6 numbers, is this normal?

I don't know what they did at mopar. But when I worked a Mack trucks and a stamped cab came out to the line with bad body damage they would pull the cab and ad another to the line at the spray booth area. The stamped numbers were never restamped onto the replacement cab. Once it went through the paint process it was to late. Over the years I have seen many cars with no numbers at all. My "body in white" Duster has no numbers, Never was stamped. I had several others over the years also.