On my '75 the chassis number is on the crossmember behind the driver seat (RHD) .... it was really difficult to see as it's stamped by a nine-stone weakling before the chassis is painted .... it was clear as day after I stripped the chassis for restoration.
It would seem some US owners have been able to satisfy the DMV computer's desire to see a certain number of digits by using the chassis number followed by a suitable number of zeros.
K
