I love this era DTM
I once had a '68 911L Targa with a Type IV out of a 914. It was still a load of fun. I'm sure you could find a nicer roller for the same money, especially if you look at '74 and later.
That interior... it's so... beige.
Just updated the post with some details, and a download I found.
I did a reverse image search, you can download a hi-rez version here