I have a 635 race car which is basically the 2 door 535 ('85 - '90 or so). I have raced it in BMWCR and it would fit nice in NASA. It definitally is a fun car to learn in. I now race a E30 325 and I think that my time in the big 6 was very worth while in my learning. The 6 is for sale cheap in anyone interested.

Michael