GO SIMPLE , USE 2" SQUARE TUBE ,AND MAKE THAT YOUR SLIP SHAFT WITH REGULAR CV JOINTS ,ITS TOUGH,ITS SIMPLE,ITS CHEAP,AND IT WORKS WELL! PLUS! YOU CAN BUILD THEM YOURSELF . UNLIMITED SLIDE ON THE DRIVELINE AND YOU CAN BEAT THE HELL OUT THEM,FRONT OR REAR.HOWD YA LIKE THEM APPLES!:awesomework...