I do not know year , am hoping someone here knows. you say yours a 71 , to me that’s pretty new. I hope mine is that age I assumed 50s or 60sThat is a different motor mount / countershaft setup than on my 10K.
This is the only picture I have on the computer, but could take more if you want to see it in better detail.
Mine is also a CL670Z and it looks like the horizontal drive setups shown in the brochures.
Do you know what year your lathe is? I think mine was 1971 give or take a year.