69 Dart 340 Swinger Trunk Vin

Hello,

I'm looking to buy a numbers matching 69 340 Dart...Engine, Trans, & Rad support match but I can't really make out the trunk vin under the paint. What I can make out does not look like it matches the vin# There are 6 numbers (3 then a space then another 3). Is this correct? Someone told me 69 should have 8 digits? What are the possible reasons the back wouldn't match? Rear quarter replaced? The engine, trans & rad support from another car maybe?

The broadcast sheet & original bill of sale from 69 match the engine, trans & rad....Should I be concerned about the rear vin not matching??

Thanks for your thoughts...