66 floor shift cable:front or back??

Its not the location on the shifter I think your refering to but the entry route to the shift lever on the transmision.
I think all shifters have the cable comming out of the front of them.
The only shifter I know of with the rear transmision entry is the Cheetah SCS. The cable approches the shift lever from the rear of the trans thus missing headers, steering linkage etc.