I had similar issue, I told mechanic there is no visible proof that engine had ever been removed, therefore no reason to investigate further, he called RTA (nsw) they told him if it was in his opinion of a mechanic that the engine had never been removed and that the engine number shown on valve cover matched paperwork then it was ok to pass the identification process. Any mechanic or man with two hands can spot an engine that has been replaced at some stage, maybe call an Indy that's local who can do the job or call the authority yourself.

