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Drill 3/4 inch hole in the floor right above the pumkin (rear axle where the gears are) and weld a 3/4 inch piece of all thread to the top of it, then run a bolt down it with a big washer and adjust it to where you want the rear end to be at. this is legal in my derby and if you got a car that is really high you can lower it and make the rear end much stiffer, if you got a low car you can raise it some, however if the rear end starts going up too far this will bend the ready rod and kind of defeating the purpose, but I like it because it helps the car bend when it's fresh.

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