TKX Shifter Location
Why not just roll the transmission into place and throw a seat in and see which position you prefer? You're going to need the transmission to be in place to know where you need to place the center hump sheet metal so you might as well just test the two shifter positions while you're at it.
I used the shift position toward the rear of the car but I made my own bracket to offset the shifter a hair toward the driver side and a few inches forward because I needed to get it centered in my 4spd console top plate.