5.2 magnum & A833

Why would you need to modify any of your clutch linkage to run a 10.5" clutch? If the larger clutch requires a later bellhousing, comparing the bellhousing fulcrum (pivot) to input shaft centerline distance will tell you if your current arm will work. Even if your original didn't, using an arm with the same ratios from the pivot point to the bearing points at the respective ends would allow your stock torque shaft to be used. All of this assumes whatever clutch/throwout bearing you do end up running, maintains the same distance from the throwout arm to flywheel surface as your current one. If you do need to use a later bellhousing, and you are keeping the original linkage, I would make sure the engine mounted ball stud for the torque shaft was in the same place, though.