Lift on 82' Pickup

Hi, I have an 82 Toyota long bed pickup truck. I have a torque rod suspension system in the front and i have rasied them quite a bit. When I raise the back end by flipping the springs, is their an issue about my drive shaft?

If you are gonna flip your leaf springs around you might have to lengthen your driveshaft. Ive seen people buy the same type of washers and just space out their drive shafts. Thats not that good of an idea. If not you can run the drive shaft still but the u joints will go out in a quickie and your car will be banging like a 70s disco ball.