Howdy,
Do you already have a firewall mounted brake pedal?
I have a stock '57 4 speed and bench seat in my truck with. I used a shifter from a 90 Chevy truck 4 speed with it. This shifter is 3-4" shorter than the TF truck shifter. Shifting with a passenger in the center of the seat is a little bit of a pain but it's nowhere near impossible.
There are a number of options for getting the clutch in there if you're using firewall mounted components. You might be able to use an 89-91 truck system which is integrated from master cylinder to slave. You might also use a slave / throwout bearing combination inside the trans to eliminate all external linkage.
