It's a sad and pathetic yarn with no basis in reality.
Here's what I can tell you. L code cars are very hard to track and verify especially ones that were built in Van Nuys.
Huh? All 'L code' Camaros were built in Van Nuys. The CRG has had no difficulty assembling and maintaining information on them in a db.
BTW in my 43 years of 1st Gen Camaros I have never heard someone refer to Van Nuys cars as 'L code'.
L529083 and this engine L530071 were both built in the second week of April 1969 and both were at the Van Nuys plant at the same time.
No, they were not. The engine in L529083 is stamped V0411DZ and the stamp looks legit. That means that engine was assembled April 11, 1969 at the Flint, MI plant. Many people have posted NCRS delivery data on their cars. From that information we know that L529083 was final-assembled on or about April 11; L530071 was final-assembled on or about April 25th. The cars were built two weeks apart. The VIN sequence was assigned as completed bodies were received from Fisher, several days prior to final assembly. There is no way anyone at Van Nuys could have known L530071 was going to be a Z/28 two weeks before the car was built. While it is true that mis-stamped VINs have been noted, they are off by one digit.
How could a Camaro built on or about April 11th in Van Nuys, CA receive an engine built the same day in Flint MI 2,282 miles from Van Nuys?
As you can imagine every Z28 fanatic/expert on ebay has brought this mismatched vin to my attention however none of them can validate the non-legitimacy or the possibility of L530071 engine being installed in car 529083 both the same week of April 1969.
Until now.
Based on the remains of the BBC, L529083 is a Z/28. There is no reason to believe it has its original engine.