i bought a tool off ebay. and used it last weekend. the tool was two pieces of steel about 3x5x1" with a channel cut into it and 4 bolts. it could only go on the bar in one location near the rear frame because of my headers and other clearance issues. but it worked!

It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspensions, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas.