Remove the kick down lever arm and the shift lever arm from the original valve body. Drain the trans fluid and remove the trans pan. Remove the 10 1/4" bolts (7/16" socket) holding the valve body to the case. Pull the valve body down a bit then forward to get the park rod out of the tail shaft. If the park rod is difficult to remove or install, rotate the driveshaft/output shaft so the lock will engage.
Remove the "E" clip holding the park rod to the valve body shifter, remove the rod and install it on the new valve body.
If you had a shift kit installed, make sure there is no restrictor installed in the holes under the front pump.
Install the new valve body, sliding the park rod back into the tail shaft housing first. Install the new filter, replace the trans pan, and install the shift lever arm.
The manual valve body is supposed to use all 15 return springs in the front clutch assembly, but you would have to remove the trans and dissasemble it to change the number of springs.


That is the how to. You may want to also replace the shifter shaft seal in the case, install a solid or shimmed modified rear servo.