I was paging through the black dragon catalog looking for bushings here and there, and noticed that the R180 and R200 were both around in 1970, since my car is a 71, I was wondering if they are stamped somewhere on my car.

Unless someone installed an R200, your car should have an R180. The R200 may have existed in 70 but it didn't get put in a Z car until the 260Z 2+2, I believe.