Caster Angle - 69 Dart

I've done it with a combination square measuring off the spindle nut. Basically you start with the wheels straight using two nuts on the spindle you lock them together so one is level. Then turn the wheels 20 degrees left, two pieces of greased sheet metal under the wheels required. Measure degee on spindle nut. Turn the wheels 20 degrees right. measure spindle again. Divide the measurments this will be your caster angle. Repeat proceedure on other side and adjust as needed. Car needs to be on level ground with @ 1/2 tank of gas.