A deuce going backward down a hill with no brakes, the engine off, the clutch pushed and transfer case and transmission in neutral should break the sound barrier provided the hill is high enough with many twisty and hair pin turns. Oh wait that woud be your bowels (sorry). The deuce would only do about 100 mph. You can not use rotor wash for cleaning mufflers. It will however work to wash dirt and other debris into your eyes. Woofers do indeed go on dogbones, infact my 2 woofers are on 2 dogbones right now. There is no TM for spoilers but from what I have observed from the wanna be thugs around me the taller the spoiler the faster it will go. If you could get a spoiler high enough to hang your laundry on and mount it to the roof it should add about 50mph to your to end.
Denny