I know some past threads have touched on this connection between the Body Unit Number stamped into the sheet metal near the radiator and the VIN numbers on our GTs but I could not find one that fit my interest in this so here goes.
In a recent flyer from OGTS Gil made mention of a early 69 GT for sale with a low Body Unit Number and how it should be preserved. I think it had a number under 1500. Not sure what the Vin was or where it fit in the production line. I think anything below U2000 is supposed to be very early production. I am not sure how many in the USA show below U1000. I was under the impression that the Vin for a Body Unit Number in the U1000 range should be lower than say a BUN of U2000.
Here is what throws a monkey wrench into that belief. Eric Schmidt here in Springfield has a number of Gts he has picked up over the years. One of them has always held my interest. It is an early 1.1L GT with flat back panel that has been set up with AC at one time. If that were not interesting enough I checked the Cowl Vin plate# and Body Unit Number and something does not add up. Body Unit Number on this GT is U790BB which is lower than I have seen posted. The VIN would seem to indicate a later build date. VIN# is 931790498 and the data plate says Made in January
One possible answer I have heard was some of the early body's were held back for quality issues and then fed back into the production stream. Eric also has another 69 1.1L with BUN of U1940 and VIN of 931823078. would be interesting to know the circumstances of the GT with BUN of U790.