for drag racing suspension setup should i use 1000 lb spring in the rear only? because i heard it should be stiff in the rear and loose in the front, or is that not true and should i do 100lb all around? any help is appreicated.

 

1000in/lb rear, softer front, traction bars, limit straps

 

Yes, if you are strictly talking about the springs, then you only have to concentrate in the rears. You definitely do not need 1000lbs springs in the fonts.