Length, Width, Clearance
1. The maximum overall width (including wheels and axles) shall not exceed 2-3/4 inches.  

2. The minimum width between the wheels shall be 1-3/4 inches so the car will clear the center guide strip on the track. 
3. The minimum clearance between the bottom of the car and the track surface shall be 3/8 inch so the car will clear the center guide strip on the track. 
4. The maximum overall length shall not exceed 7 inches.  The size of the block of wood you received.  If your car is too long (i.e. weights sticking out the back), you will have time to correct it. 

5. The wheel-base (distance between the front and rear axles) may not be changed from the kit body distance of 4-1/4 inches. 

Note: You will have time the morning of the race to correct these issue, however you must be complete prior to race time.   If you are not the entry (car) will be moved to the family race.