I have an April built 69 and if I remember correctly the date codes seemed correct but there was no VIN stamping on the engine - matching the Shelby # or otherwise. The previous owner believed it may have not been stamped in error. I know I've seen earlier original cars with extra VIN's, No VIN's and, mixed VIN's. I've seen 69/70 cars with partial VIN's on shock towers (maybe plant code and sequential number). However, it sounds like from these posts that its unlikely a 69/70 Shelby or Mustang got out the door without the VIN on the engine? If that's the case I'll have to try and get to it again and relook but I'm pretty sure there's nothing at all. Great topic, thanks.