We have had allot calls from Modifieds with the spec aluminum heads (okc fairgrounds rules).
Here is what you do.........you put 50 lbs in front of a centerline of the front axle and the left front of the car.
Attached drawing shows where to mount it. ![](http://www.hoseheadforums.com/images/uploadedimages/Forums/media/Enid%20Speedway/Modified%20rules1.jpg)
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