Identifying Preproduction cars/Looking for color version of this picture

[martyjac]

This was one of the hardest magazines to find during my pre-internet hunt. One of the coolest covers too. Drag Parts Illustrated May '69.

[Coralsnake]

Thank you all for the notes and the opportunity to get the record straight.

The magazine cover confirms the GT500 was Gulfstream Aqua and had the same license plate. I believe it may be the only preproduction car that didnt survive.   

[Coralsnake]

It looks like the plate on the red car is partially visible ?

[Coralsnake]

Unfortunately, the research ran out of preproduction cars. The GT350 convertible had to be a production car and a very early built car. I started with 0001 and it matched all the same options. The last car in the archive was the first 1969 Shelby with a serial
number. It was a maroon and white convertible.

I was also able to do a similar woodgrain comparison on this car and the features matched.

Thanks to everyone that helped!