if the body goes down the drivehaft comes up as it is contstant. you may have to build a driveshaft hump of some kind to accomidate . make shure it is tall enought to accomidate the suspension travel.
i did not channel my t bucket body it is on top of the frame and i had to build a tunnel in the center for the driveshaft to get a lowride height with 34 inch tires .