I glad I found this thread. This topic has been discussed on and off. My interior is different than a standard Chevelle. The front and back seat patterns are from a Skylark GS Custom. The door pannels are also Buick with longer arm rests than the standard Chevelle arm rests. There is also carpet on the lower 1/4 of the front door pannels. There is also a different headliner in the car too. I can remember right now but I think it has more ribs than the standard Chevelle. My car was also produced in Baltimore on 03D (last week of March). My TR reads 765-980 B.
I think we are on to something with all of these people comming forward. I always thought my interior was from the factory, but had no way to prove it. It could have been swapped sometime during its 30 year life.
Two issues ago in Chevy High Performance, there was a letter dealing with this same issue. They would like more letters on the subject. If you need any thing else let me know.
I will try to take some pictures of the interior and post them to a web site.
68 SS - I checked out your profile after I posted. Wow, I am in Wellington, OH. It's a small world.
[This message has been edited by thornbe (edited 12-31-1999).]