I posted before about my trans... How hard would it be to swap a five speed into it? Just curious

 

There are a couple wbody owners (I known of a Grand Prix and impala owner) that swapped in a getrag manual trans. I don't have the links anymore (can probably google for then again). It requires a lot of custom fab (drive shafts, various brackets, clutch pedal and such). Plus custom tuning for the car.

It's a lot of work, but it can be done.