Wheelie bars
If the car has the stock front suspension then it is recommended to have the sprung wheelie bars, but if it has the strut front end with limited travel then go with the solid bars. The general idea is to have them about 50% of the wheelbase (in your case about 54-60"). The shorter the bars are, the more leverage they will have to try to lift the rear tires and create spin.
JMO
Bill Mitchell