[Ivan]

I own this car in question and I believe it is real. Very well respected experts who have actually seen the car seem to agree. You can't deny that. 992 points at The 2011 Muscle Car and Corvette Nationals says something. Donny in all due respect have you seen the car in person? If you have you have never mentioned that fact in any of your posts on any forum. And what qualifications do you have that tower over Alan Colvin and the judges of MCCN including Bill Braun who is the chief judge of MCCN? No disrespect but what are your qualifications? Why are you not a judge on the authenticity of these special cars? Or are you? I want the facts and the truth. I am not crying fraud or am I a expert by any means. Of course since I own the car I want it to be real. And since you don't you want it to be a fake.
The date code on the block confirm it was built very late in 66'. Would that be a 68' motor? The answer is no. It is a 67' motor. It also is stamped "ID" which confirms it is one of the 11 of 17 built in 1967. The other 6 were stamped "IK". The GM bulletin was issued in March of 1967 stating the motor will be available in the beginning of April of 67'. 1967 Impalas were still being built in July of 67'. The car was built in the 5th week of May of 67'. Therefore it is very possible that a L-72 was installed in a 67' Impala. All the dates make sense. Also there is a picture of the L-72 in the full size 1967 assembly manual that actually shows the L-72 diagram. There is no "cancelled" to be found on any of the pages that reference this motor for the 67' model year. Also about the "4D" on the data plate. It has been verified by a build sheet on a true 1967 Impala SS/427 that the data plate did not have the stamp '4D" but was a real SS/427. Maybe some plants or maybe only one used that code. You have no proof they all had that stamp and it was proven you were wrong by a build sheet. Explain that one Donny. This particular car was built in Los Angeles. These are all undeniable FACTS!
I talked to the owner of the car and I was told the reason this car surfaced decades after is that he had no knowledge himself that the car existed even though it was sitting in his backyard. Yes he owned the car and he knew it was a 427/425 L-72 but when he discovered that the 11 of the 17 motors built for the 67' model year had a stamp of "ID" he decided to take a stroll to the car to check. Shazam!! That is where it begins. He thought the previous owner might have installed a different motor from the original. He now knew he was wrong all these years. And what about that second car that someone by the name of Danny Z. claims he owned and purchased through the Chevrolet. Here is his post:

"I had one when I worked at Chevrolet Engineering - tagged it for employee purchase the day it arrived in the Company Car Fleet garage; L-72 4-speed SS427, special-ordered by Engineering for Chassis Development. It hit the 3,000-mile mark in December, and I bought it and drove it home just before Christmas; sold it in Flint a couple of years later.
Removed the "Special Order" tag from the left side front fender reinforcement and put it in my rollaway just before I sold it, still have the tag - photo below. There may not have been any L-72 SS427's built on dealer order for retail sale, but there was at least one built for Engineering; I bought several sets of rear tires for it in the two years I owned it."

Bottom line is I respect everyone including Donny. I am again by no means a expert but I do have common sense. The fact is that the build sheet, protecto-plate, and or the original dealer invoice will may never be found on this car. If was available it would have most likely already surfaced. But does that mean this car is not the real deal? The answer is there is no right or wrong answer to that question. The facts prove that this can very well be a real deal. There is too many FACTS pointing in that direction. I am a firm on my belief it is real because I go by facts. For those who scream fraud just think that even you know Chevrolet kept poor records back in those days. You know that the build sheet can have very well be thrown away at the end of the assembly line. How many of today's classics actually have the build sheet that comes with the car? And how many dealer invoices come with all the classic cars on the planet today? Maybe 10% ? Come on you have to admit it is possible and with all the facts that pertain to this specific car it is highly likely this IS THE REAL DEAL".