Many inspectors don't have a clue. They might say nah these cars never had XX motor. BUt you can say, AH, but the very last of the deluxe's from 1972 had the larger engine for the JDM market, and this one got shipped down here. It's a very rare car mate! And many of them would be like Oh, really. Okay. Works really well with the police who don't know sh!t from clay.
A bloke here in NZ does those plates too. Apparently the hard part is getting all the numbers stamped in a perfectly straight line.