53ChevSD
The measurement from the "face" of the transmission where it contacts the bell housing to the center of the shifter, on a T-5 from a 85-86 S10 is 11 15/16"
Hope this helps.
I put this tranny in a 1979 Chevy C10 with a bench seat using the stock S10 shifter and shift lever and it fits well. You will likely have to cut a new hole in the "hump".
EV