you'll need a new trans, and probably a new t-case (spline count is often different between 4-cyl and 6-cyl). also new rear axle (you have the weak D35c). you'll also need to cut the motor mounts off the frame and weld on new 6-cyl motor mounts. then there is the wiring harness and computer changes. the stroker should get a piggyback ECU for tuning as well.