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You want maximum weight transfer to the rear wheels; i.e., squat. The Z, being originally inteded as a handler, not a dragger, seems to have a lot of anti-squat geometry built in to its suspension...this works against you. But you will want to modify the shock/spring settings to achieve maximum weight transfer/traction. Exactly how much they need to be modified, I don't know. You'll have to do some research. Look at the setups the big draggers here run, talk to them a little bit. Also look into weight transfer/drag-racing/spring/shock theory some to analyze what kind of spring rates and bound/rebound rates you'll want. Also, you want to have the biggest possible contact patch on your rear tires, so in addition to deflating the tires some you're going to want to make sure that you have proper camber. Since your Z will hopefully squat a lot (large degree of suspension deflection), the camber is going to change, (probably positively) when under acceleration. With unequal length wishbones, camber gain is a funtion of suspension deflection. Not sure what the exact relationship is, but you should be able to figure that out. Once you find out how much the body is going to squat, find out the change in camber from at rest to under acceleration, and compensate by adjusting the static camber in the oposite direction, so that you have zero camber when you're on the throttle. I know this isn't plug n' play information, but I hope it helps nonetheless.
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