727 guts question

the spring goes against the valve body but have no fear. toss it in the trash can. you can leave it out or you can make a rod, i forget the exact length, that is just long enough to put between the piston and trans case bore that enables you to reenstall the valve body back on, a little slop is fine. this is the very basic shift kit you can do. the piston is called an acumulator servo and solfens the shifts.