Hi Bryan,
My piccies were taken from my RS2000 delivered to me on the 9th of May 1980 brand new. The seats and the tilt forward levers are definitely original fitted to this car.
Maybe there were other design levers also, but not sure.
The other version lever down near the recliner knob were the same Scheel seats, however were either earlier or later version seats. Some people say earlier, others say later. I tend to think the version with the lever half way up the seat are the later version, however I may be incorrect. A mate has an October 1980 build RS2000 with a completely tracable history. His levers are the same as mine, half way up the seat.