I would like to take a moment to thank every one for sharing their knowledge. With your help I think that we managed to put together a couple of solid contenders!!
Here where the results.
The green fender car won pack and den and is headed to districts.
The thin wheeled car took second in the open division. It lost to a 15oz car
El Blocko took third on the open division. It weighed 5oz with stock axles and unmodified wheels. It was my testament to proper axle and wheel bore prep.